The best is yet to be, the last of life, for which the first was made.
In mathematics, you don't understand things. You just get used to them.
The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
永远不要让自尊心妨碍你在需要时寻求帮助。
你必须保持偏执才能生存。
Freedom is not a gift but an achievement that must be won every day.