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

The only good is knowledge and the only evil is ignorance.

As the biggest library if it is in disorder is not as useful as a small but well-arranged one so you may accumulate a vast amount of knowledge but it will be of far less value than a much smaller amount if you have not thought it over for yourself.

Reading furnishes the mind only with materials of knowledge it is thinking that makes what we read ours.

Humility and knowledge in poor clothes excel pride and ignorance in costly attire.

The true method of knowledge is experiment.

Today knowledge has power. It controls access to opportunity and advancement.

Knowledge which is divorced from justice may be called cunning rather than wisdom.

I prefer tongue-tied knowledge to ignorant loquacity.

Suppose that we are wise enough to learn and know - and yet not wise enough to control our learning and knowledge so that we use it to destroy ourselves? Even if that is so knowledge remains better than ignorance.

If knowledge can create problems it is not through ignorance that we can solve them.

Where there is shouting there is no true knowledge.

Where is all the knowledge we lost with information?

All our knowledge has its origins in our perceptions.

All our knowledge begins with the senses proceeds then to the understanding and ends with reason. There is nothing higher than reason.

Even the knowledge of my own fallibility cannot keep me from making mistakes. Only when I fall do I get up again.

Knowledge has to be improved challenged and increased constantly or it vanishes.

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.

We know accurately only when we know little with knowledge doubt increases.

Let us tenderly and kindly cherish therefore the means of knowledge. Let us dare to read think speak and write.

Doubt grows with knowledge.

Knowledge is true opinion.

Knowledge which is acquired under compulsion obtains no hold on the mind.

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