If a man empties his purse into his head, no man can take it away from him. An investment in knowledge always pays the best interest.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

Opinion is the medium between knowledge and ignorance.

Cherish that which is within you, and shut off that which is without; for much knowledge is a curse.

There is nothing so absurd or ridiculous that has not at some time been said by some philosopher.

Knowing your own darkness is the best method for dealing with the darknesses of other people.

The good life is one inspired by love and guided by knowledge.

Nothing leads so straight to futility as literary ambitions without systematic knowledge.

One cannot conceive anything so strange and so implausible that it has not already been said by one philosopher or another.

I hope our wisdom will grow with our power, and teach us, that the less we use our power the greater it will be.

Smart people learn from everything and everyone, average people from their experiences, stupid people already have all the answers.

You never had time to learn. They threw you in and told you the rules and the first time they caught you off base they killed you.

Our destiny exercises its influence over us even when, as yet, we have not learned its nature; it is our future that lays down the law of our today.

The roots of education are bitter, but the fruit is sweet.

He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors.

If someone succeeds in provoking you, realize that your mind is complicit in the provocation.

Amid the seeming confusion of our mysterious world, individuals are so nicely adjusted to a system, and systems to one another and to a whole, that, by stepping aside for a moment, a man exposes himself to a fearful risk of losing his place forever.

Man must cease attributing his problems to his environment, and learn again to exercise his will - his personal responsibility in the realm of faith and morals.

A man must stand erect, not be kept erect by others.

Know yourself. Don't accept your dog's admiration as conclusive evidence that you are wonderful.