We believe that under the influence of the word of God and the work of the Holy Spirit man comes to a realization of his lost condition. 
Psalms 32:1-5 – 
Blessed is he whose transgression is forgiven, whose sin is covered. Blessed is the man unto whom the LORD imputeth not iniquity, and in whose spirit there is no guile. When I kept silence, my bones waxed old through my roaring all the day long. For day and night thy hand was heavy upon me: my moisture is turned into the drought of summer. Selah. I acknowledge my sin unto thee, and mine iniquity have I not hid. I said, I will confess my transgressions unto the LORD; and thou forgavest the iniquity of my sin. Selah. 
Psalms 51:3, 4 – 
For I acknowledge my transgressions: and my sin is ever before me. Against thee, thee only, have I sinned, and done this evil in thy sight: that thou mightest be justified when thou speakest, and be clear when thou judgest. 
John 16:7, 8 – 
Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you. And when he is come, he will reprove the world of sin, and of righteousness, and of judgment.

“Repentance includes sorrow for sin and a turning away from it.”

“But when the heart yields to the influence of the Spirit of God, the conscience will be quickened, and the sinner will discern something of the depth and sacredness of God’s holy law, the foundation of His government in heaven and on earth.”

“We shall not renounce sin unless we see its sinfulness; until we turn away from it in heart, there will be no real change in the life.” – Steps to Christ, pp. 23, 24.
See 2 Corinthians 7:10 – For godly sorrow worketh repentance to salvation not to be repented of: but the sorrow of the world worketh death.