I do not perceive even one other thing, O monks, that when undeveloped and uncultivated entails such great suffering as the mind. The mind when undeveloped and uncultivated entails great suffering.
Monks, one thing, if practiced and made much of, conduces to great thrill, great profit, great security after the toil, to mindfulness and self-possession, to the winning of knowledge and insight, to pleasant living in this very life, to the realization of the fruit of release by knowledge. What is that one thing: It is mindfulness centered on the body.
One of his students asked Buddha, "Are you the Messiah?" "No," answered Buddha. "Then are you a healer?" "No," Buddha replied. "Then are you a teacher?" the student persisted. "No, I am not a teacher." "Then what are you?" asked the student exasperated. "I am awake," Buddha replied.