God said "be holy because I am holy" - that still applies, God is still, and will always be, holy.
But that doesn't mean that we are expected to think, "that verse comes from a book which talks about OT food laws, therefore Peter must be saying that holiness means keeping those laws and we can't be holy otherwise." If that's what Peter meant, he would have said so. He, and other NT writers, would have made absolutely sure that Gentiles knew that in order to be considered holy by God, they had to keep food laws which had been given to their ancestors thousands of years before. That's not what happened though. Nowhere in the NT do the writers say, "come to Jesus for salvation and new life and then go and read Leviticus and make sure you keep it."
Leviticus 11:44-45 For I am the Lord your God. Consecrate yourselves therefore, and be holy, for I am holy. You shall not defile yourselves with any swarming thing that crawls on the ground. 45 For I am the Lord who brought you up out of the land of Egypt to be your God. You shall therefore be holy, for I am holy.”
It was a common practice for Jewish boys to memorize the Torah by the age of 12 and then to memorize more of the OT if they were to become a disciple of a rabbi. Paul would have been required to have memorized the entire OT in order to become a disciple of Gamaliel. So it was a high context society where someone could quote a verse to bring to mind an entire passage, such as when Jesus quoted the first line of Psalms 22 while on the cross to bring to everyone's mind the entire Psalm. The NT authors quoted or alluded to the OT thousands of times and often times looking at the surrounding context of what they are quoting from helps to give a better understanding of what they are saying. So 1 Peter 1:16 would have brought to mind Leviticus 11:44-45, which talks specifically about dietary laws and telling us to have a holy conduct meant following God's instructions for how to have a holy conduct, so that was Peter making sure that they understood that they were to follow those laws.
We don't become righteous and holy, by having a righteous and holy conduct, but rather those who are declared righteous and holy by faith are called to have a righteous and holy conduct. In the same way that someone who is declared to be a Firefighter in now to go out and fight fires, being declared righteous and holy means we are now to go do what is righteous and holy. Here is another passage that makes it explicit:
1 John 3:4-10
Everyone who makes a practice of sinning also practices lawlessness; sin is lawlessness. 5 You know that he appeared in order to take away sins, and in him there is no sin. 6 No one who abides in him keeps on sinning; no one who keeps on sinning has either seen him or known him. 7 Little children, let no one deceive you. Whoever practices righteousness is righteous, as he is righteous. 8 Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil. 9 No one born of God makes a practice of sinning, for God's seed abides in him, and he cannot keep on sinning because he has been born of God. 10 By this it is evident who are the children of God, and who are the children of the devil:
whoever does not practice righteousness is not of God, nor is the one who does not love his brother.
God's law gives us knowledge of sin (Romans 3:20) and without the law we wouldn't even know what sin (Romans 7:7), so the law defines what sinfulness and righteousness are and they understood sin to be practicing lawlessness and that the opposite to be practicing righteousness in accordance with God's law. Whenever the Bible talks about righteousness, it's talking about living in obedience to God's commands by faith (Habakkuk 2:4).
Even the Jews don't obey all the laws they were given at Sinai - as far as I'm aware they don't sacrifice animals these days and they have no temple to keep all the festivals. If these were their laws and they don't keep them, why are some people trying to put Christians in bondage to them?
God did not give the law to Moses and the Israelites to be a heavy legalistic burden or to put them in bondage, but rather it was meant to be received by faith as a divine privilege and a delight, as the Psalmists understood (Psalms 1:2, Psalms 119), and as Paul understood (Romans 7:22). It is sin in violation of God's law that puts us in bondage and it is sin that Jesus died to set us free from so that we could be free to obey God's law.
The laws in regard to how to do Temple worship only apply when there is a Temple to worship in, but we should continue to do what we can in regard to God's instructions for how to keep the His Feasts, just as the Jews in the Diaspora continued to keep the them. God said that His Feasts were ordinances lasting forever, Paul continued to keep them throughout Acts, and we will be keeping them during the Millennium. They are shadows of the Messiah that teach us important things about him and about God's plans.
Jesus is, and was, God. He came to die so that we could be reconciled to God in a way that the Israelites never could be by animal sacrifices. He sealed, with his blood, the New Covenant that was made. Everything has changed because God came to earth himself and laid down his life for us. Jesus told us that it is not food that makes a person unclean; not what goes into the mouth but what comes out of it. Jesus was raised from the dead and ascended to the Father so that he could send his Holy Spirit to live in us. The Spirit is transforming us into Jesus' image and likeness. The Holy Spirit in us helps us to live holy lives; set apart from the world, belonging to, committed to and following Jesus, changing our actions, words, thinking and mind-set so that we become like him.
Ezekiel 36:27 And I will put my Spirit within you, and cause you to walk in my statutes and be careful to obey my rules.
The role of the Spirit is to cause us to obey God's laws, so the Spirit helps us to have holy lives by helping us to obey God's instructions for that. The context of Mark 7 is about a man-made ritual law where bread that is eaten with unwashed hands becomes common or defiled and thereby makes the person who ate it common or defiled. Jesus used a figurative parable to point out that kosher food eaten in this way passes through the digestive track and ends up in the sewer without entering the heart, so the Pharisees concern for this ritual purity law was out of balance with their concern for moral purity. At the end of the parallel account in Matthew 15:20, it confirms that Jesus was still talking about nullifying a man-made ritual purity law and the topic never switched to being about God's dietary laws. Consistently throughout the Bible man-made laws are nullified while God's laws are upheld.
We call God 'Father' because Jesus told us that he is Father and we are his children. We are his children if we have received his Holy Spirit, who confirms this (Romans 8:9,16).
Jesus is my Lord and Saviour, God is my Father and I am his child and an heir, together with Christ. Jesus has not taught me that I am not his child if I eat pork.
The opposite is true, according to 1 John 3:10 distinguishes who are children of God and who are children of the devil by who practices righteousness in accordance with the law. It is those who have a carnal mind that do not submit to God's law (Romans 8:7).
We don't have a commandment TO keep them; that's the point.
Honestly, you shouldn't have to tell someone who is a servant of God that they should obey God and you shouldn't have to tell someone who a disciple of Jesus that they should imitate his sinless example of obedience. What would be nonsensical would be to join a new religion while being unconcerned with following their code of conduct. God is righteous and holy and does not have to different standards of righteousness and holiness, and it is just as important for Gentiles to have a righteous and holy conduct as it is for Jews.
I haven't joined the Jewish religion and have no Jewish ancestors or relatives.
The Christian faith has its roots in Judaism; Jesus came as a Jew, the disciples were Jewish and we read the OT. But Christianity split from Judaism, became a sect and people like Paul persecuted the church. Why? Because they said that the Messiah had come - in Jesus.
The identity of Jesus is THE difference between Christians and Jews - and all other faiths in fact. WE say that he is the Messiah, our Lord and Saviour, the Son of God, actually God himself.
I was not brought up to obey Jewish food laws, I went to church and Sunday school where I learned about Jesus.
Jesus didn't come to start a new religion, but rather he was born a Jew, became a Jewish rabbi, had Jewish disciples, a is the Jewish Messiah in fulfillment of Jewish Prophecy. Muslims who are waiting for the Mahdi to come have no expectations that if he came he would start a new religion, but rather he would bring about the fullness of Islam, and in the same way Jesus brought about the fullness of Judaism. So Christianity is a Jewish religion and it is the fullness of Judaism, which Gentiles have been grafted into. As I pointed out before, for at least the first 7-17 years after Christ's ascension every Christian was a Torah observant Jew. Gentiles splitting of from Judaism was never intended and is where they errored in their understanding of the role of the law and the Jews, in losing the correct cultural context in which to interpret the Bible, and in alienating Jews from their Messiah. Christians teaching that Jesus did away with the law is sadly one of the biggest reasons by non-believing Jews reject Jesus because that would disqualify him as the Messiah in violation of Deuteronomy 13. We were both not brought up to obey God's food laws, but that is sadly because we both inherited our theology from centuries of leaders who said shockingly anti-Semitic things and who did not understand the role of the law.
[/quote]It says it was a sin for the Israelites to eat unclean animals.[/quote]
According to Ephesians 2:12, Gentiles were once separated from Christ, alienated from Israel and strangers to the covenants of promise, and had no hope and without God in the world, but according to Ephesians 2:19 all of that is no longer true, Gentiles are no longer strangers and aliens, but are now fellow citizens of Israel. Also according to 1 Peter 2:9-10 Gentiles are now included among God's people, so Gentiles should follow the laws that God has given to His people. God's instructions for what is a righteous or sinful conduct did not change between covenants because God is righteous and God did not change.
You may have been brought up on the OT, or started to read the Bible from the beginning, been told, that you have to obey the Jewish food laws and that anything else in sin; I wasn't. I went to Sunday school from an early age and learnt about Jesus - who he was, what he taught, how he died for me and what it means to come to him and be forgiven, made clean and adopted as a child of God. THEN I started to read the OT, about God's promises to Abraham about how the nation of Israel was formed and the exodus from Egypt, about how God called this nation to be his holy people, how he gave the covenant, which they continually broke so that eventually he said he was going to make a new one with them. Should I then say, "oh, the Lord Jesus sealed that covenant with his blood, but the only way I can belong to God is to go back to the OT covenant and start obeying that?"
I grew up attending a Baptist church for 30 years, so I grew being taught in a similar way as you. It's only in the last few years that I've been studying the Jewish cultural context of the Bible that I was compelled to change my views about God's law and I've found that it makes much more sense of the Bible. Paul said that our faith upholds the law (Romans 3:31), that the law is holy, righteous, and good (Romans 7:12), that the law is spiritual (Romans 7:14), and he delights in the law in his inner being (Romans 7:22), but other places he said that we died to the law (Romans 7:6), but that we still aren't permitted to sin (Romans 6:15), yet it's the law that instructs us about what sin is (Romans 7:7), so Paul's opinion of the law becomes jumbled unless you understand the Jewish cultural context. Even if you don't agree with my conclusion, I think I've learned much more in-depth about the Bible in the last few years than in the previous 30, so I'd highly recommend studying that.
In any case, learning about the NT first and then interpreting the OT from that perspective is precisely backwards. The early Christians only had the OT because the NT wasn't written and compiled until later. The NT authors quoted or alluded to the OT thousands of times to establish their authority and that what they said was consistent with it. The Bereans in Acts 17:11 checked everything that Paul said against OT Scriptures to see if it was true, so if you interpret Paul as being against keeping God's laws, the you understand him differently than the people who walked and talked with him. In 2 Peter 3:14-17, it is essentially saying that Paul is difficult to understand, but Paul's writings plus being ignorant and unstable leads to the error of lawlessness. Sadly, many Christians have fallen into this error by rejecting God's law, but I am seeing many who are waking up to this fact.
I have never suggested that we go back to following the Old Covenant. What I am saying is that God is holy, righteous and good, which means that He does what is holy, righteous, and good, and God has give us instructions for how to likewise do what is holy, righteous, and good conduct, which is based on His character. This is independent of any particular covenant and we should have such a conduct even if God had made no covenants with us.
He obeyed the Jewish law, yes; he was a Jew.
He did not tell his disciples they would be saved by keeping the law, that they would sin if they did not obey the law and they had to teach all Gentiles to believe in him and THEN obey the law.
Paul says that if we keep one part of the law we have to keep all of it - that includes circumcision, not wearing mixed fabrics and all the hygiene laws, as well as sacrificing animals for the forgiveness of sins, not just not eating certain types of food.
I have never suggested that we need to keep the law in order to be saved. That was never the purpose of the law, and trying to become justified by obeying it through our own efforts is in fact a perversion of it. The law was always meant to be obeyed by faith in a way that built a relationship between God and his people (Habakkuk 2:4). God always disdained when his people obeyed the law while their hearts were far from him (Isaiah 1:13-16, Isaiah 29:13, Mark 7:6-13). Our obedience to God should always be rooted in faith and love. In order to become justified through keeping the law, someone would need to keep all of it perfectly and then their justification would be owed them by God through a cold legal transaction, which was not the way it was intended. So there is a world of difference between saying that we don't need to keep the law in order to become justified and saying that we don't need to keep the law. The law is not about how we become justified, but about how God wants us to live out lives by faith as we grow in our relationship with Him and are made to be more like Christ in his character and obedience to God.