The key to security is not to trust anyone, including yourself.
唯一的善,是知识;唯一的恶,是无知。
在科学中,荣誉归于说服世界的人,而不是首先想到这个想法的人。
The desires, and other passions of man, in themselves, are in his own power; his real difficulties are, to know when they are to be controlled, and when not.