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Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.

沒有事實，只有解釋。

我們不做市場調查。我們只做我們相信的東西。

I have now taken a serious task upon myself and I fear a greater one than is in the power of any man to perform.

The only real love is the love of truth.

自然系統的當前狀態顯然是前一時刻的結果，如果我們設想一個智能體在某一瞬間理解了這個宇宙中所有實體的關系，它就能陳述這些實體在過去或未來的任何時間的各自位置、運動和一般效應。