'Understand' in the Bible

I committed myself to understand, to learn, to search for wisdom and explanations, and to understand both the evil that is foolishness and the stupidity that is delusion.

I applied my mind to know wisdom and to understand the business that is done on earth--how neither day nor night one's eyes see sleep.

I saw all of it as the activity of God. Frankly, a human being cannot understand what happens on earth, because however hard a man works to discover it, he will not find out. Despite what he thinks he knows, he will not be able to figure it out.

Just as you do not understand the way of the spirit in the womb of a pregnant mother, so also you do not know what God is doing in everything he makes.