Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法：它是关于理解的。
The world owes all its onward impulses to men ill at ease; the happy man inevitably confines himself within ancient limits.
If your opinions on one subject can be predicted from your opinions on another， you may be in the grip of an ideology. When you truly think for yourself your conclusions will not be predictable.
Knowledge is the most valuable resource in the universe.
Happiness and unhappiness depend upon the opinion we have of things.
我一直相信，你永远不应该放弃，即使只有最微小的机会，你也应该继续奋斗。