The only true wisdom is in knowing you know nothing.

Opinion is the medium between knowledge and ignorance.

When I examine myself and my methods of thought, I come to the conclusion that the gift of fantasy has meant more to me than my talent for absorbing positive knowledge.

The most crucial use of knowledge and education is to understand the importance of developing a good heart.

As the traveler who has once been from home is wiser than he who has never left his own doorstep, so a knowledge of one other culture should sharpen our ability to scrutinize more steadily, to appreciate more lovingly, our own.

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

For beautiful eyes, look for the good in others; for beautiful lips, speak only words of kindness; and for poise, walk with the knowledge that you are never alone.

Teach the ignorant as much as you can; society is culpable in not providing a free education for all and it must answer for the night which it produces. If the soul is left in darkness sins will be committed. The guilty one is not he who commits the sin, but he who causes the darkness.

I keep six honest serving men (they taught me all I knew); Their names are What and Why and When And How and Where and Who.

To furnish the means of acquiring knowledge is the greatest benefit that can be conferred upon mankind. It prolongs life itself and enlarges the sphere of human existence.

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

The possession of knowledge does not kill the sense of wonder and mystery. There is always more mystery.

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.

No power and no treasure can outweigh the extension of our knowledge.

A wise man proportions his belief to the evidence.

The wise man does at once what the fool does finally.

First, have a definite, clear practical ideal; a goal, an objective. Second, have the necessary means to achieve your ends; wisdom, money, materials, and methods. Third, adjust all your means to that end.