It is probably safe to say that all the changes of factual knowledge which have led to the relativity theory resulting in a very great theoretical development are completely trivial from any point of view except their relevance to the structure of a theoretical system.

There is no greater impediment to the advancement of knowledge than the ambiguity of words.

To that class we may leave it to refine the vernacular dialects of the country to enrich those dialects with terms of science borrowed from the Western nomenclature and to render them by degrees fit vehicles for conveying knowledge to the great mass of the population.

One of the greatest joys known to man is to take a flight into ignorance in search of knowledge.

As writers become more numerous it is natural for readers to become more indolent whence must necessarily arise a desire of attaining knowledge with the greatest possible ease.

The greatest sin is judgment without knowledge.

A great many things which in times of lesser knowledge we imagined to be superstitious or useless prove today on examination to have been of immense value to mankind.

Learn from me if not by my precepts then by my example how dangerous is the pursuit of knowledge and how much happier is that man who believes his native town to be the world than he who aspires to be greater than his nature will allow.

Exclusively of the abstract sciences the largest and worthiest portion of our knowledge consists of aphorisms: and the greatest and best of men is but an aphorism.

I have thought about it a great deal and the more I think the more certain I am that obedience is the gateway through which knowledge yes and love too enter the mind of the child.