Do not pursue the past. Do not lose yourself in the future. The past no longer is. The future has not yet come. Looking deeply at life as it is. In the very here and now, the practitioner dwells in stability and freedom. We must be diligent today. To wait until tomorrow is too late. Death comes unexpectedly. How can we bargain with it? The sage calls a person who knows how to dwell in mindfulness night and day, 'one who knows the better way to live alone.'
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.
When an evil-doer, seeing you practise goodness, comes and maliciously insults you, you should patiently endure it and not feel angry with him, for the evil-doer is insulting himself by trying to insult you.
If you determine your course With force or speed, You miss the way of the dharma. Quietly consider What is right and what is wrong. Receiving all opinions equally, Without haste, wisely, Observe the dharma.
I will purify my bodily actions through repeated reflection. I will purify my verbal actions through repeated reflection. I will purify my mental actions through repeated reflection. That's how you should train yourself.