God has made everything fit beautifully in its appropriate time, but he has also placed ignorance in the human heart so that people cannot discover what God has ordained, from the beginning to the end of their lives.

When a sentence is not executed at once against a crime, the human heart is encouraged to do evil.

then I discerned all that God has done: No one really comprehends what happens on earth. Despite all human efforts to discover it, no one can ever grasp it. Even if a wise person claimed that he understood, he would not really comprehend it.

Who really knows if the human spirit ascends upward, and the animal's spirit descends into the earth?

Whatever has happened is beyond human understanding; it is far deeper than anyone can fathom.