Repentance out of mere fear is really sorrow for the consequences of sin, sorrow over the danger of sin โ it bends the will away from sin, but the heart still clings. But repentance out of conviction over mercy is really sorrow over sin, sorrow over the grievousness of sin โ it melts the heart away from sin. It makes the sin itself disgusting to us, so it loses its attractive power over us. We say, โthis disgusting thing is an affront to the one who died for me. Iโm continuing to stab him with it!โ
Timothy KellerI've heard plenty of Christians try to answer the why question by going back to the what. "You have to believe because Jesus is the Son of God." But that's answering the why with more what. Increasingly we live in a time in which you can't avoid the why question. Just giving the what (for example, a vivid gospel presentation) worked in the days when the cultural institutions created an environment in which Christianity just felt true or at least honorable. But in a post-Christendom society, in the marketplace of ideas, you have to explain why this is true, or people will just dismiss it.
Timothy Keller