Mark 1:15

Now after John was imprisoned, Jesus went into Galilee and proclaimed the gospel of God. He said, “The time is fulfilled and the kingdom of God is near. Repent and believe the gospel!”

Repent: to feel such sorrow for sin or fault as to be disposed to change one's life for the better; be penitent. The sorrow that is felt at the time of repentance is not a lasting, damaging sorrow that traps us in our past sins. Rather, it is a freeing, convicting, empowering sorrow that helps us receive the grace of God in Christ Jesus, and change our lives. We can live assured in our hope in Christ, because He has forgiven our sins, and continues to give grace as we live our lives for Him. In Christ we are forgiven and made right before God: whiter than snow.