He has made everything beautiful and appropriate in its time. He has also planted eternity [a sense of divine purpose] in the human heart [a mysterious longing which nothing under the sun can satisfy, except God]—yet man cannot find out (comprehend, grasp) what God has done (His overall plan) from the beginning to the end.

Who is like the wise man? and to whom is the sense of anything clear? A man's wisdom makes his face shining, and his hard face will be changed.

A wise person's good sense protects him, but a fool's lack of sense leaves him vulnerable.

And when the foolish man is walking in the way, he has no sense and lets everyone see that he is foolish.