Majjhimanikaya

“You tell me to stand still, but I am not walking," he shouted, "whereas you who are walking say you are still. How is it that you are standing still but I am not?"The Buddha turned round. "My legs move but my mind is still," he said. "Your legs are still but your mind moves all the time in a fire of anger, hatred, and feverish desire. Therefore, I am still but you are not.”