自己吃饱了应当想到别人的饥饿，身上穿暖了应当想到别人的寒冷，享受安逸应当想到百姓的劳累。

The poet is a man who puts up a ladder to a star and climbs it while playing a violin.

改变令人不适，但停滞是致命的。

In mathematics, you don't understand things. You just get used to them.

如果你不相信自己，就没有人会相信你。