'Man of Understanding' in the Bible

David’s uncle Jonathan was a counselor; he was a man of understanding and a scribe. Jehiel son of Hachmoni attended the king’s sons.

As shameful conduct is pleasure for a fool,so wisdom is for a man of understanding.

The intelligent person restrains his words,and one who keeps a cool headis a man of understanding.

Counsel in a man’s heart is deep water;but a man of understanding draws it out.