The more you dwell in the past, the less you prepare for the future.
I said, to the people of the Philippines whence I came, I shall return. Tonight, I repeat those words: I shall return!
出自汉·桓宽《盐铁论·刺赋》。释义:冰和炭不能放在同一个容器之中,太阳和月亮也不会同时照耀大地。比喻君子与小人不能同处,或比喻相互矛盾的理论不能同时运用。