世界上最危险的事情是试图分两次跨越鸿沟。
The best way to learn is to teach.
True understanding comes from grasping the inner structural relationships of a problem.
Freedom is not something that anybody can be given. Freedom is something people take, and people are as free as they want to be.
自然状态有一种自然法则来管理它,这种法则约束着每个人:而理性,即这种法则,教导所有愿意咨询它的人类,既然都是平等和独立的,任何人都不应伤害他人的生命、健康、自由或财产。