The unspiritual man rejects these truths of the Spirit of God; to him they are 'sheer folly,' he cannot understand them. And the reason is, that they must be read with the spiritual eye.
so he said, "It is granted you to understand the open secrets of the Reign of God, but the others get it in parables, so that for all their seeing they may not see, and for all their hearing they may not understand.
Your eye is the lamp of the body: when your eye is sound, then the whole of your body has light, but if your eye is diseased, then your body is darkened.