Every great advance in natural knowledge has involved the absolute rejection of authority.

To be conscious that you are ignorant of the facts is a great step to knowledge.

Prices are important not because money is considered paramount but because prices are a fast and effective conveyor of information through a vast society in which fragmented knowledge must be coordinated.

The great end of life is not knowledge but action.

The more extensive a man's knowledge of what has been done, the greater will be his power of knowing what to do.