There are only two words in the New Testament for sin. God specifically chooses who will go to heaven and who will not. God predestines believers to be conformed to the image of His son. Man comes to Christ because he senses his need for salvation. We are saved by faith, not works.
Belief comes by hearing good music.
Repentance is turning toward God. In the conversion process, behind the scenes, God is impregnating us with His Spirit through the word. Newness is being recently converted. One approach to sanctification is legalism. Once you are a Christian you can never forfeit your salvation.