I know we don't have to follow the rules in leviticus but what else
Leviticus 19:18b is where we find the law 'Love thy neighbor as thyself'. Leviticus 18:1-29 is where we find the definition of what Jesus and Paul both called 'sexual immorality' (Mark 7:20-23 & Galatians 5:16-26). So Leviticus is still useful to us.
But the laws and commandments of Torah were never intended as a yardstick with which to measure perfection. Instead, they were an example of one of the earliest constitutions under which a society could maintain its cohesiveness and strength. It was to be used by a monotheistic people in the same manner as The Code of Hammurabi was being used by the polytheists who surrounded them. It was only centuries later that the laws and commandments were seen as being of any value for attaining eternal life.
Even the promise made by God to the Hebrews as a reward for their keeping the laws and commandments of Torah was purely societal in nature:
If you pay attention to these laws and are careful to follow them, then the Lord your God will keep his covenant of love with you, as he swore to your forefathers. He will love you and bless you and increase your numbers. He will bless the fruit of your womb, the crops of your land - your grain, new wine and oil - the calves of your herds and the lambs of your flocks in the land that he swore to your forefathers to give you. You will be blessed more than any other people; none of your men or women will be childless, nor any of your livestock without young. The Lord will keep you free from every disease. He will not inflict on you the horrible diseases you knew in Egypt, but he will inflict them on all who hate you. (Deuteronomy 7:12-15,NIV)
There's the contract. God agreed to reward the Hebrews with abundant crops, ever-increasing livestock, children, and freedom from the diseases which were rampant in some parts of the Middle East during that time period. But there is no mention of their earning their salvation.
In fact, there's no mention of there being an afterlife anywhere in Torah. Even today many Jews accept this verse, found in Torah, as the only thing which they are to expect following their death:
"
By the sweat of your brow you will eat your food until you return to the ground, since from it you were taken; for dust you are and to dust you will return." (Genesis 3:19,NIV)
By the time that Jesus sojourned among us there were Jewish sects, such as the Pharisees, who taught that if the people obeyed the laws they could earn their way into heaven. But the 'laws' they were referring to were far more than the original 613 societal laws and commandments we find in Torah. In order to convert those laws from being societal to being salvific they had added literally thousands of laws in subsets to each of the original commandments. The Sabbath commandment alone had over 1,000 laws in a subset attached to it, and in order to obey that commandment in a manner that could earn them eternal life, the people had to obey every one of those 1,000+ sublaws perfectly.
Jesus himself taught which commandments he saw as still important, and we find these in the gospels. Those commandments which he reiterated, such as the commandments not to murder, steal, bear false witness,
et al., we Christians are to accept as important for us to abide by. We find examples of these in Matthew 19:16-26, and in Mark 7:17-23. The commandment to love God is a reiteration of Deuteronomy 6:5. He also confirmed that there is indeed a life to attain following this one, but he was quick to say that our attaining it was dependent on God, rather than on ourselves (Matthew 19:26).
However, we Christians are to do much more than merely 'go through the motions' by superficially following a set of laws. Not only are we to do the right things, but we are also to do them for the right reasons:
So I say, live by the Spirit, and you will not gratify the desires of the sinful nature. For the sinful nature desires what is contrary to the Spirit, and the Spirit what is contrary to the sinful nature. They are in conflict with each other, so that you do not do what you want. But if you are led by the Spirit, you are not under law.
The acts of the sinful nature are obvious: sexual immorality, impurity and debauchery; idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions and envy; drunkenness, orgies, and the like. I warn you, as I did before, that those who live like this will not inherit the kingdom of God.
But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control. Against such things there is no law. Those who belong to Christ Jesus have crucified the sinful nature with its passions and desires. Since we live by the Spirit, let us keep in step with the Spirit. Let us not become conceited, provoking and envying each other. (Galatians 5:16-26,NIV)
Our words and actions can only conform to what God wants of us if the motivations which lead to their commission also conform to what God wants of us. And that can only occur if the motivations are those listed as 'the fruit of the Spirit'. If we have as the impetus for our actions those listed as 'the acts of the sinful nature' instead, then the words and actions which they lead us to commit must be seen as sinful, since the motivations which led to those words and actions were themselves sinful. You cannot obtain good fruit from a poisoned tree, and in like manner you cannot perform righteous acts while using sinful motivations.
And how do we obtain 'the fruit of the Spirit'? We obtain this fruit through accepting the salvation which God himself has earned on our behalf, and now bestows on all who humbly ask it of him:
Now we know that whatever the law says, it says to those who are under the law, so that every mouth may be silenced and the whole world held accountable to God. Therefore no one will be declared righteous in his sight by observing the law; rather, through the law we become conscious of sin.
But now a righteousness from God, apart from law, has been made known, to which the Law and the Prophets testify. This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference, for all have sinned and fall short of the glory of God, and are justified freely by his grace through the redemption that came by Christ Jesus. God presented him as a sacrifice of atonement, through faith in his blood. He did this to demonstrate his justice, because in his forbearance he had left the sins committed beforehand unpunished - he did it to demonstrate his justice at the present time, so as to be just and the one who justifies those who have faith in Jesus. (Romans 3:19-26,NIV)
The righteousness which saves us isn't our righteousness; it's God's. And as a reward for our admitting this fact, confessing our unworthiness, and humbly asking for this righteousness in return for putting our faith in what God has already accomplished on our behalf through his Son, Jesus Christ, we not only receive that righteousness as a gift which we could never earn, but we also receive the indispensable aid of the Holy Spirit, who enters our lives bringing this fruit with him.
So our living Christian lives begins not with a decision to obey a set of laws, but with a decision to accept the gift of salvation which God offers to all of us. It is from this decision that everything else falls into place, and for anything that we do to truly conform to what God wants of us, it is this decision that we must make first.
God bless-