The deepest sin against the human mind is to believe things without evidence.

Human behavior flows from three main sources: desire, emotion, and knowledge

Industrialize or perish.

A thought is an idea in transit.

You can never learn less, you can only learn more.

Investigate, educate and organize.

Don't worry that children never listen to you; worry that they are always watching you.

Just because I don't care doesn't mean I don't understand.

I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.

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

The direction in which education starts a man will determine his future in life

What we know is a drop, what we don't know is an ocean.

Knowledge becomes evil if the aim be not virtuous.

In mathematics you don't understand things. You just get used to them.

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

If one cannot enjoy reading a book over and over again, there is no use in reading it at all.

The most important part of teaching is to teach what it is to know.

Books are as useful to a stupid person as a mirror is useful to a blind person.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

Reading without reflecting is like eating without digesting.

Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.