You have to be willing to take risks, and if you fail, you have to be willing to get up and try again.
尽力而不能达到的,圣人不会苛责于人。应当尽心而未尽心,圣人不会推御责任。
永远不要低估坚持的力量。大多数人放弃得太早。
In mathematics, you don't understand things. You just get used to them.
过去总是紧张的,未来是完美的。