What we are today comes from our thoughts of yesterday, and our present thoughts build our life of tomorrow: our life is the creation of our mind. If a man speaks or acts with an impure mind, suffering will follow him as the wheel of the cart follows the beast that draws the cart. If a man speaks or acts with a pure mind, joy follows him as his own shadow.
How easy it is to see your brother's faults, How hard it is to face your own. You winnow his in the wind like chaff, But yours you hide, Like a cheat covering up an unlucky throw. Dwelling on your brother's faults Multiplies your own. You are far from the end of your journey. The way is not in the sky. The way is in the heart. See how you love.
So in this case, Kalamas, don't go by reports, by legends, by traditions, by scripture, by logical conjecture, by inference, by analogies, by agreement through pondering views, by probability, or by the thought, 'This contemplative is our teacher.' When you know for yourselves that, 'These qualities are unskillful; these qualities are blameworthy; these qualities are criticized by the wise; these qualities, when adopted & carried out, lead to harm & to suffering' - then you should abandon them.
Beware of the anger of the body. Master the body. Let it serve truth. Beware of the anger of the mouth. Master your words. Let them serve truth. Beware of the anger of the mind. Master your thoughts. Let them serve truth.