你不仅要相信自己，还要相信你所做的事情。
释义：时机未到，不可强行行动；事情未明，不可勉强成功。这句话告诫人们要尊重客观规律，不可急于求成。
爱国不是选择，而是责任。
The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.
Mathematics is not a spectator sport—you have to engage with it to appreciate its beauty.