Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

For, verily, great love springs from great knowledge of the beloved object, and if you little know it, you will be able to love it only little or not at all.

Knowledge of the past and of the places of the earth is the ornament and food of the mind of man.

New knowledge is the most valuable commodity on earth. The more truth we have to work with, the richer we become.

Where all is but dream, reasoning and arguments are of no use, truth and knowledge nothing.

The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.

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

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

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

The limit of man s knowledge in any subject possesses a high interest which is perhaps increased by its close neighbourhood to the realms of imagination.