The primary rules of obligation are those that require or forbid certain actions.
有时最艰难的战斗发生在我们内心的沉默中。
Don't bend; don't water it down; don't try to make it logical; don't edit your own soul according to the fashion. Rather, follow your most intense obsessions mercilessly.
《三民主义·民权主义·第三讲》(1924年)
微生物什么都不是;环境才是一切。
机会不会自己发生,你要去创造它们。