"An ill-directed mind does greater harm to the self than a hater does to another hater or an enemy to another enemy."
"He in whom is born a sublime longing for the Ineffable, whose mind is permeated by this longing, whose thoughts are not bewildered by attachment — such a person is called "one bound upstream."
"Even as an elephant on the battlefield endures the arrow shot from the bow, so shall I bear with abusive language. Verily, most people are ill-tempered."
All from The Dhammapada