We are to preach the motives of repentance, that men may not repent from mere fear of hell, but they must repent of sin itself. Every thief is sorry when he has to go to prison; every murderer is sorry when the noose is about his neck. The sinner must repent, not because of punishment of sin, but because his sin is sin against a pardoning God, sin against a bleeding Savior, sin against a holy law, sin against a tender Gospel. The true penitent repents of sin against God, and he would do so even if there were no punishment.
We are to tell of the source of repentance, namely, that the Lord Jesus Christ is exalted on high to give repentance and remission of sins. Repentance is a plant that never grows on nature’s dunghill: the nature must be changed, and repentance must be implanted by the Holy Spirit or it will never flourish in our hearts. We preach repentance as a fruit of the Spirit, or else we greatly err.

- Charles Spurgeon

1834 – 1892