While sinners remain under the entire dominion of a wicked heart they are altogether blind to the spiritual excellence of the character, the works and the ways of God. "Hear now this, O foolish people, and without understanding; which have eyes, and see not; which have ears, and hear not" (Jer. 5:21). The natural man is blind. This awful fact was affirmed again and again by our Lord as He addressed hypocritical scribes thus: "blind leaders of the blind," "ye blind guides," "thou blind Pharisee"