Some of us go through their entire life with their heads buried in the proverbial sand. God even warns us about them, here in:5:21 (King James version): “Hear now this, O foolish people, and without understanding; which have eyes, and see not; which have ears, and hear not.” : : “There are none so blind as those who will not see. The most deluded people are those who choose to ignore what they already know.