The first sermon that Christ preached, indeed, the first word of his sermon was 'Repent'. - Thomas Watson

Repentance is a pure gospel grace. The covenant of works admitted no repentance; there it was, sin and die. Repentance came in by the gospel. Christ has purchased in his blood that repenting sinners shall be saved.

Though heaven be given us freely, yet we must contend for it, "Whatsoever thy hand findeth to do, do it with thy might" (Eccl. 9:10)

Repentance is a grace of God's Spirit whereby a sinner is inwardly humbled and visibly reformed.