The greatest killer of happiness is comparison. If you must compare， compare yourself to you yesterday

纪律是目标和成就之间的桥梁。

我做过的最有争议的事情就是坚持下来。

You are not the opinion of somebody who doesn't know you or care about you.

Freedom is nothing but a chance to be better.

All the choir of heaven and furniture of earth - in a word， all those bodies which compose the frame of the world - have not any subsistence without a mind.

数学不是一项观赏性运动。