Pain in life is inevitable but suffering is not. Pain is what the world does to you, suffering is what you do to yourself [by the way you think about the 'pain' you receive]. Pain is inevitable, suffering is optional. [You can always be grateful that the pain is not worse in quality, quantity, frequency, duration, etc]

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.

Do not be thoughtless, always be mindful, watch your thoughts! Draw yourself out of the path of evil, like an elephant sunk in mud.

It is not life and wealth and power that enslave men, but the cleaving to life and wealth and power.

Cut out the love of self, like an autumn lotus with thy hand!

Thoughtfulness is the way to deathlessness, thoughtlessness the way to death. The thoughtful do not die: the thoughtless are as if dead already.

Do not say anything harsh: what you have said will be said back to you.