Every champion was once a contender who refused to give up.
The study of mathematics is a constant dialogue between the concrete and the abstract.
最好的艺术来自痛苦。
人们时常觉得有必要拿出自己特意准备好的一面来展示给路人看——就像是布置商店橱窗一样——而这样的展示一旦时过境迁,也就无须太放在心上了。