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Knowledge is that possession that no misfortune can destroy, no authority can revoke, and no enemy can control. This makes knowledge the greatest of all freedoms.

One whose knowledge is confined to books and whose wealth is in the possession of others, can use neither his knowledge nor wealth when the need for them arises.

I am not one who was born in the possession of knowledge; I am one who is fond of antiquity, and earnest in seeking it there.

Knowledge is the eye of desire and can become the pilot of the soul.

Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom.

Knowledge is the life of the mind.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

A man can only attain knowledge with the help of those who possess it. This must be understood from the very beginning. One must learn from him who knows.

There is no self-knowledge but an historical one. No one knows what he himself is who does not know his fellow men, especially the most prominent one of the community, the master's master, the genius of the age.

It is not knowledge, but the act of learning, not possession but the act of getting there, which grants the greatest enjoyment.