invisiblenothing said in post 1:
Why am I doubting? A lot because someone on the internet said something like I`m not true believer.
A true believer is someone who believes, most importantly, that Jesus of Nazareth is the Christ and the human/divine Son of God (John 20:31, John 3:36; 1 John 2:23), and that he died on the Cross for our sins and rose from the dead on the third day (1 Corinthians 15:1-4, Luke 24:46-47, Matthew 20:19, Matthew 26:28). Do you believe these things?
Once we do believe these things, to help develop and keep up our relationship with God, we should pray to him every day, such as with the Lord's Prayer (Matthew 6:9-13), praising and worshipping him, confessing our sins to him, asking him for what we need today, and thanking him for all that he has given us (Philippians 4:6). And throughout the day we should immediately bring to him in prayer anything that we become worried about at anytime (Philippians 4:6-7).
We should also fellowship with other Christians every day (Hebrews 3:13, Hebrews 10:25), at least in some fashion (Matthew 18:20), such as on this forum, being exhorted by them and exhorting them in turn (Hebrews 3:13).
We also need to examine ourselves to make sure that we're truly in the faith in its entirety (cf. 2 Corinthians 13:5, Proverbs 28:26, Proverbs 14:12). The way to do this is to read every word of the Bible (Hebrews 4:12, Matthew 4:4) and see if we accept everything it teaches as having come from God (John 8:47; 2 Timothy 3:16). For just as a true faith will initially come from reading (or hearing) what the Bible teaches (Romans 10:17; 2 Timothy 3:15), so we can know that we're remaining in the true faith in its entirety if we continue to believe everything that the Bible teaches came from God (John 8:31b; 2 Timothy 4:2-4; 1 Timothy 4:1, Mark 8:35-38).
In order to have any real relationship with Jesus, and God the Father, and the Holy Spirit (Matthew 28:19), it's very important to believe all the right things about Jesus (John 14:6-7): that he's God the Word made flesh (John 1:1,14), that he's the Christ (1 John 5:1; 1 John 2:22), and that he's the only begotten (only born) Son of God (John 3:16,36; 1 John 2:23), meaning that he's the only person ever born without any human father (Luke 1:34-35). And we must believe that Jesus lived a perfectly sinless life (Hebrews 4:15; 2 Corinthians 5:21) and so he could die on the Cross for our sins and rise from the dead on the third day (1 Corinthians 15:1-4). He rose and will remain forever in an immortal flesh and bones human body (Luke 24:39; 2 John 1:7) as our eternally-human high priest/mediator (1 Timothy 2:5, Hebrews 2:16-17, Hebrews 7:24-26).
Once we come into faith in Jesus, we must obey him, and God the Father, and the Holy Spirit, by repenting from all of our sins and getting water-immersion (burial) baptized into Jesus (Acts 2:38, Romans 6:3-5, Galatians 3:27). And we must partake of the divine flesh and blood of the bread and wine of communion (John 6:53, Matthew 26:26-28; 1 Corinthians 10:16; 1 Corinthians 11:27-30). And we can get hands laid on us to receive Holy Spirit baptism (Acts 8:17) and one or more of the Holy Spirit's wonderful Spiritual gifts (Acts 19:6; 1 Corinthians 12:8-10). Then, washed from our sins by water baptism (Acts 22:16) and empowered by the Holy Spirit within us (Acts 1:8, Ephesians 3:16), we must each and every day for the rest of our lives deny ourselves, take up our crosses, and follow Jesus (Luke 9:23; 2 Corinthians 5:15), by continuing in the faith to the end (Hebrews 3:6,12,14, Hebrews 6:4-8, John 15:6; 2 Timothy 2:12), by repenting from every sin we might commit to the end (Hebrews 10:26-29; 1 Corinthians 9:27, Luke 12:45-46), and by doing the particular spiritual works which he has given us as individuals to do to the end (Mark 13:34, Romans 12:6-8, Titus 3:8).
But if we as believers wrongly employ our free will to refuse to do these things, then we can't expect to have any continued real relationship with Jesus, and God the Father, and the Holy Spirit. For a continued real relationship with them requires that we not only continue to believe in them but also continue to obey them (John 15:10, John 14:21,23). Faith without works is dead (James 2:20) and can't ultimately save us (James 2:14-26, Romans 2:6-8, Matthew 7:21, Hebrews 5:9).
invisiblenothing said in post 1:
How do I know that I have truly repented?
Regarding repenting from a sin (e.g. Acts 8:22; 2 Corinthians 12:21, Revelation 3:19), that means to change one's mind regarding that sin, in the sense of having no plans to ever commit it again, knowing that God has made it possible for believers not to sin (John 8:34-36, Romans 8:2-14, Romans 6:1-23; 2 Corinthians 7:1), even when they're tempted to do so (1 Corinthians 10:13; 2 Peter 2:9, Matthew 6:13; 1 Corinthians 9:27, Romans 8:13, Galatians 5:16).
But if, sometime after repenting from a sin, believers nonetheless wrongly employ their free will to commit that sin again, this doesn't mean that they hadn't previously repented from that sin, or that they as continued believers in Jesus Christ and his gospel aren't saved. What they need to do is repent from that sin again and confess it to God, and they will be completely forgiven (1 John 1:9, cf. Luke 17:4).
Satan wants believers to fail to continue to come to Jesus, to think that it's hopeless, that they're just too evil for Jesus, when in fact Jesus is waiting with open arms to forgive them for their sins which weigh down on them so heavily (Matthew 11:28-30).