行动是正确的，因为它们倾向于促进幸福；错误是因为它们倾向于产生与幸福相反的结果。
Actions are right in proportion as they tend to promote happiness； wrong as they tend to produce the reverse of happiness.
The most important property of a program is whether it accomplishes the intention of its user.
思想之流是维持生命的行为之流。
城市林业证明自然与城市可以共同繁荣。
"In the end, we are all stories, told and retold, until we become part of the collective memory."
You are never too old to set another goal or to dream a new dream.