2 Chronicles 7:13-14 – When I shut up the heavens so that there is no rain, or command the locust to devour the land, or send pestilence among my people, if my people who are called by my name humble themselves, and pray and seek my face and turn from their wicked ways, then I will hear from heaven and will forgive their sin and heal their land.
1 John 1:7-10 – But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin. If we say we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.  If we say we have not sinned, we make him a liar, and his word is not in us.
What is Repentance?
- Recognition – [Repentance is] an awareness of having defied God by embracing what He despises and despising what He adores.
- Remorse – Repentance is never a pleasure. It always entails pain. It demands brokenness of heart (Ps. 51:17; Isa. 57:15). [It is not] out of fear of reprisal, rather than from a hatred of sin.
- Request – We must ask God for forgiveness and for strength.
- Repudiation – We must repudiate all sins in question and take active, practical steps to avoid anything that might provoke stumbling.
- Reformation – There must be an overt determination to pursue purity, to do what pleases God (1 Thes. 1:9).