We think, that with our rational brain, we can solve everything! This is one of the problems faced by man when he reads the scriptures. He feels, that with his intellect, he can explain everything. Now, one must understand that the intellect, however much it expands, has a certain limit beyond which it cannot grow! There are many things, which cannot be explained by it, and the intelligent man is the one who realizes this limitation. The intelligent man is one who realizes that his puny brain cannot understand many things.