CLINIAS, THE PYTHAGOREAN.
“This philosopher was a person very different, both in his life and manners, from other men. If it chanced at any time that he was inflamed with anger, he would take his harp, play upon, and sing to it; saying, as often as he was asked the cause of his so doing, ‘That by this means he found himself reduced to the temper of his former mildness.’”
Treasury of Ancient and Modern Times.