To preach the gospel is to show people their need for salvation against a backdrop of God's nature and the character of sin, and then present Jesus as the only remedy for what ails them and the world. In my weekly preaching in the worship services I always call people to believe in Christ.
Timothy KellerAt the root of all our disobedience are particular ways in which we continue to seek control of our lives through systems of works-righteousness. The way to progress as a Christian is to continually repent and uproot these systems the same way we become Christians, namely by the vivid depiction (and re-depiction) of Christโs saving work for us, and the abandoning of self-trusting efforts to complete ourselves. We must go back again and again to the gospel of Christ-crucified, so that our hearts are more deeply gripped by the reality of what he did and who we are in him.
Timothy KellerRepentance 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 Keller