不要为未来担忧,不要为过去哭泣。
Fear not for the future, weep not for the past.
卓越不是一种行为,而是一种习惯。
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
你唯一的限制是你给自己设定的限制。
你必须相信自己,即使别人不相信你。