The only defense against the world is a thorough knowledge of it.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

The only fence against the world is a thorough knowledge of it.

The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others

No man's knowledge here can go beyond his experience.

Where all is but dream, reasoning and arguments are of no use, truth and knowledge nothing.