If you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. Romans 10:9
Being a Christian is more than just an instantaneous conversion- it is a daily process whereby you grow to be more and more like Christ.
A Christian is not someone who confesses Jesus is Lord one day and then returns to their previous lifestyles. A Christian, is a person who has believed in their heart and confessed with their mouth that Jesus Christ is Lord, and has turned away from their sin in pursuit of God Himself. A change of nature occurs. For instance, Saint Peter was a Christ follower, a Christian per say, except he had to go through conversion.
In Luke 22 Jesus tells Peter, “Satan has desired to sift you as wheat, but I have prayed for you so that when you are converted you may strengthen your brothers and sisters in the faith”. Peter under the influence of Satan (fear and different lies), denied knowing Jesus the Lord. But when he came to his senses, he was then able to be converted. Grace is necessary: Jesus had grace for Peter because Peter’s conversion without forgiveness, led him to self-condemnation. Condemnation is self imposing of blame and guilt, which causes separation from God. The process of conversion can only be done, when God’s Holy Spirit is present and working in the individual’s life. Conversion is the turning of the whole man from sin to God: in conversion God turns the heart and nature of a person from sin to holiness.
The bible says we are the temple of God. If we believe with our hearts, and confess with our mouths that Jesus is Lord then the Holy Spirit seals us unto redemption. We are then infilled with God’s Holy Spirit who takes care of creating us into His Divine nature: essentially making us a new creation. Without the Holy Spirit of God, we remain with the spirit of this world (the human spirit). But when Holy Spirit comes, He becomes one with our Spirit. (1 Corinthians 6, Romans 8:16)
Lord God, I pray for all those reading according to your word in Romans 15:13, which says may the God of hope fill you with all joy and peace as you trust in Him, so that you may overflow with hope by the power of the Holy Spirit. In Jesus name, Amen.