The political liberty of the subject is a tranquility of mind arising from the opinion each person has of his safety.
公司的价值观应该指导从董事会到农场的每一个决定。
I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.
The best way to predict the future is to invent it.