为了追求快乐，而把快乐建筑在别人的痛苦上，便会受到怨恨的困扰，而无法摆脱怨恨。
Only things with which a man identifies himself are able to disturb his mind-only that which concern “ myself ”can give me grief.
聪明的人不奢望未来，也不追悔过去。
To be attached to one thing （to a certain view） and to look down upon other thing （views） as inferior--this wise men call a fetter.
