As I have mentioned at the evening service (and I as recommended you read), I have been reading John Murray's Redemption: Accomplished and Applied. Dr. Murray provides a terrific reminder of the greatness of the saving grace of repentance in the life of a believer [p. 116]:
Repentance reminds us that if the faith we profess is a faith that allows us to walk in the ways of this present evil world, in the lust of the flesh, the lust of the eyes, and the pride of life, in the fellowship of the works of darkness, then our faith is but mockery and deception. True faith is suffused with penitence. And just as faith is not only a momentary act but an abiding attitude of trust and confidence directed to the Saviour, so repentance results in constant contrition.
Please take up and read. This brief book will greatly enhance your understanding of Christ's work of redemption in your life and bring encouragement to you.