Dreams need courage, and even more action.

Whether we are describing a king, an assassin, a thief, an honest man, a prostitute, a nun, a young girl, or a stallholder in a market, it is always ourselves that we are describing.

世间万物不可能都完美无缺，可怜那些执着的人总是被忧愁困扰。

数学不是一项观赏性运动；要理解它，必须积极参与其中。