When you know a thing, to hold that you know it, and when you do not know a thing, to allow that you do not know it - this is knowledge.

Pain and foolishness lead to great bliss and complete knowledge, for Eternal Wisdom created nothing under the sun in vain.

No man can reveal to you nothing but that which already lies half-asleep in the dawning of your knowledge.

Knowledge is knowing that we cannot know.

Perplexity is the beginning of knowledge.

To know, is to know that you know nothing. That is the meaning of true knowledge.

It is not when truth is dirty, but when it is shallow, that the lover of knowledge is reluctant to step into its waters.

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

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

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.