According to 2 Cor. 7: 8-13 there is a worldly sorrow and a Godly sorrow. Only the Godly sorrow produces true repentance. Even though the Scriptures exhort us to repentance, it is necessarily God's gift. Only by the will and mercy of God are we able to understand and acknowledge the magnitude of our sin and thus exercise true repentance. Only in this way can God be glorified. And so, it should be our constant prayer that He would make us to understand our sin that put the Son on the cross.