He that is soon angry - אפים קצר ketsar appayim, "short of nostrils:" because, when a man is angry, his nose is contracted, and drawn up towards his eyes.
Dealeth foolishly - He has no time for reflection; he is hurried on by his passions, speaks like a fool, and acts like a madman.
The contrast lies between two forms of evil. Hasty anger acts foolishly, but the “man of wicked devices,” vindictive and insidious, incurs all men‘s hatred.