Doubt grows with knowledge.

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

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

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.

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

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

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

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.

All our knowledge has its origins in our perceptions.

Where is all the knowledge we lost with information?