The Limits of Human Understanding

Ecclesiastes 8:16-17

When I applied myself to gain wisdom and to observe how people occupy themselves on earth, that people's eyes don't see sleep either by day or by night,

then, on looking over all of God's work, I realized that it is impossible to grasp all the activity taking place under the sun; because even if a person works hard at searching it out, he won't grasp it; and even if a wise person thinks he knows it, he still won't be able to grasp it.