The most important property of a program is whether it accomplishes the intention of its user.
The secret of joy in work is contained in one word – excellence. To know how to do something well is to enjoy it.
Life is too short to not take risks.
用正確的眼光看，最平凡的生活也能變得非凡。
年輕人是可怕的，因為怎么能知道他的將來不如我們現(xiàn)在呢？但如果一個人到了四十、五十歲還默默無聞，他也就沒有什么可怕的了。
用右手畫圓形，左手畫方形，不能同時畫成