Whatever is born is impermanent and is bound to die. Whatever is stored up is impermanent and is bound to run out. Whatever comes together is impermanent and is bound to come apart. Whatever is built is impermanent and is bound to collapse. Whatever rises up is impermanent and is bound to fall down. So also, friendship and enmity, fortune and sorrow, good and evil, all the thoughts that run through your mind – everything is always changing.

-- Patrul Rinpoche