The progress of geology has been greatly retarded by the substitution of imaginary causes for the real.
地质学的进步因用想象的原因代替真实的原因而大大受阻。
我们可以在不压迫的情况下执行正义。
"The principles of a free society are essential for human progress and prosperity."
人生是由小小的幸福积累而成的。
You have to believe in yourself when no one else does.
战争是可怕的，但不是最可怕的事情；道德和爱国情感的衰败和堕落，认为没有什么值得战争，更糟糕。
预测未来的最好方法就是创造未来。
理解问题是解决问题的一半。
Freedom is a heavy load, a great and strange burden for the spirit to undertake.
Never try to discourage thinking, for you are sure to succeed.
完成事情的最好方法就是简单地开始。