数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

Every revolution evaporates and leaves behind only the slime of a new bureaucracy.

All mankind... being all equal and independent, no one ought to harm another in his life, health, liberty or possessions.

In software systems, it is often the early bird that makes the worm.

Separate the processes of creation from improving. You can’t write and edit， or sculpt and polish， or make and analyze at the same time. If you do， the editor stops the creator. While you invent， don’t select. While you sketch， don’t inspect. While you write the first draft， don’t reflect. At the start， the creator mind must be unleashed from judgement.