Seems like something you'd read from a fortune cookie. But there's plenty of scripture references if you don't go to Chinese restaurants. Real insight doesn't come with a cookie, but from the Bread of Life.
Proverbs 14:17 A quick-tempered man acts foolishly,
Proverbs 17:27-28 He who has knowledge spares his words,
And a man of understanding is of a calm spirit. Even a fool is counted wise when he holds his peace; When he shuts his lips, he is considered perceptive.
God help me not to respond to provocation with unrestrained and cruel vengeance. Help me to consider the example of my savior and to consider my words and actions before they are spoken and acted out.