I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.

Zeal without knowledge is fire without light.

Science may set limits to knowledge, but should not set limits to imagination.

Holmes is a little too scientific for my tastes — it approaches to cold-bloodedness. I could imagine his giving a friend a little pinch of the latest vegetable alkaloid, not out of malevolence, you understand, but simply out of a spirit of inquiry in order to have an accurate idea of the effects. To do him justice, I think that he would take it himself with the same readiness. He appears to have a passion for definite and exact knowledge.

If we do not plant knowledge when young, it will give us no shade when we are old.

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

Zeal without knowledge is sister of folly.

Education: that which reveals to the wise, and conceals from the stupid, the vast limits of their knowledge.

There must be opportunities for judgment to mature. When, therefore, you increase your business to a very great extent, and the multitude of problems increase with its growth, you will find, in the first place, that the man at the head has a diminishing knowledge of the facts and, in the second place, a diminishing opportunity of exercising a careful judgment upon them.

We know what we are, but know not what we may be.

And what, Socrates, is the food of the soul? Surely, I said, knowledge is the food of the soul.

I believe that imagination is stronger than knowledge. That myth is more potent than history. That dreams are more powerful than facts. That hope always triumphs over experience. That laughter is the only cure for grief. And I believe that love is stronger than death.

You see, in life, lots of people know what to do, but few people actually do what they know. Knowing is not enough! You must take action.

It is the province of knowledge to speak and it is the privilege of wisdom to listen.

His priority did not seem to be to teach them what he knew, but rather to impress upon them that nothing, not even... knowledge, was foolproof.

Through zeal, knowledge is gotten, through lack of zeal, knowledge is lost; let a man who knows this double path of gain and loss thus place himself that knowledge may grow.

Wonder, rather than doubt, is the root of knowledge.