Biblical repentance is godly sorrow for one’s sin together with a resolution to turn from it.* Repentance is necessary for salvation and necessary for godly living. Daily repentance should be present in the daily life of every believer. There is a faulty idea about repentance that it is for salvation only. The process of conviction, confession and repentance is not only the path to God in salvation it is the path back to God as we deal with sin every day. Through Christ we can have peace with God and forgiveness of every sin.
But unless you repent, you too will all perish. Luke 13:3 (NIV)
When He comes, He will convict the world about sin, righteousness, and judgment: John 16:8 (HCSB)
If we say, “We have no sin,” we are deceiving ourselves, and the truth is not in us. If we confess our sins, He is faithful and righteous to forgive us our sins and to cleanse us from all unrighteousness. 1 John 1:8-9 (HCSB)
Repent, then, and turn to God, so that your sins may be wiped out, that times of refreshing may come from the Lord, Acts 3:19 (NIV)
Come close to God, and God will come close to you. Wash your hands, you sinners; purify your hearts, for your loyalty is divided between God and the world. Let there be tears for what you have done. Let there be sorrow and deep grief. Let there be sadness instead of laughter, and gloom instead of joy. Humble yourselves before the Lord, and he will lift you up in honor.
James 4:8-10 (NLT)
* Definition of repentance from Christian Theology by Millard J. Erickson