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.

The study and knowledge of the universe would somehow be lame and defective were no practical results to follow.

Knowledge earns you power, character earns you respect.