Buck Barrow, brother of Clyde Barrow (Bonnie & Clyde) was once asked "Where are you wanted by the law?" Barrow replied, "Wherever I've been." What a picture of our own guilt. We cannot escape our sinfulness because it follows us everywhere. Neither can we escape the mercy of God that is always there.
A recovery of the old sense of sin is essential to Christianity. Christ takes for granted that men are bad. Until we really feel this assumption of His to be true, though we are part of the world He came to save, we are not part of the audience to whom His words are addressed.
Our Christian faith - and correlatively, our account of apologetics - is tainted by modernism when we fail to appreciate the effects of sin on reason. When this is ignored, we adopt an Enlightenment optimism about the role of a supposedly neutral reason in the recognition of truth.