A fool is a hater of God. A fool is one who is morally weak, who misuses what God has given him for selfish purposes. He is lustful (Prov. 7:22), lazy (Eccl. 10:15), does not fear God (Prov. 14:2), hates knowledge (Prov. 1:22), and is self-righteous (Prov. 12:15). As Christians, we are to avoid foolishness (Eph. 5:4). (See Eccl. 7:25, Prov. 3:35, 10:8).