Low self-esteem causes me to believe that I have so little worth that my response does not matter. With repentance, however, I understand that being worth so much to God is why my response is so important. Repentance is remedial work to mend our minds and hearts, which get bent by sin.
Hang on! God will be thy strength in any act of your pursuit.
Despite our battered exterior and in spite of the festering scars and rank filth that overlays it, there is underneath it all the pristine likeness of God Himself. And we would be wise to cast an eye not on the marred exterior, but to be fixed on the glorious interior.