God has already done His role in our salvation by sending Christ to die for the sins of man. Man must do his role in obeying Christ (Hebrews 5:9) to take advantage of what God has done for man.
God would get all the credit for man's obedience to Christ (Hebrews 5:9) will not be perfect. If my obedience could be perfect, then I would have no sin and would therefore have no need of God's grace and my reward would be of debt and not of grace (Romans 4:4).
But my obedience is not perfect leaving me in need of God's grace and that grace is conditional upon my repentance of my sins, repentance of my not being perfect. Luke 17:10 my imperfections leave me unprofitable servant in need of grace for I could not do what was my duty perfectly.
1) did you notice that Christ said 'he that DOETH the will of my Father" are the ones that will enter the kingdom?? So your and my role is to obey Christ (Hebrews 5:9) do the will of God. Again, I will not be perfect in doing God's will but as long as there is repentance God has forgiveness.
Believe John 8:24
Repentance Luke 13:3
confession Matthew 10:32-33
be baptized, Mark 16:16
live faithfully unto death Revelation 2:10
"believeth" as used here and some other places is used as a synecdoche where it includes repentance, confession and baptism.
Acts 16:33-34 "And he took them the same hour of the night, and washed their stripes; and was baptized, he and all his, immediately. (34) And he brought them up into his house, and set food before them, and rejoiced greatly, with all his house, having believed in God."
"Having believed" of verse 34 sums up all the jailer had just done, including repentance (washing of stripes) and be baptized.
