All good intellects have repeated, since Bacon's time, that there can be no real knowledge but which is based on observed facts.

All good intellects have repeated, since Bacon's time, that there can be no real knowledge but which is based on observed facts.

To understand a science it is necessary to know its history.

Woman is the most moral element in all humanity.

nd now that man's history has been for the first time systematically considered as a whole, and has been found to be, like all other phenomena, subject to invariable laws, the preparatory labours of modern Science are ended.

Every science consists in the coordination of facts; if the different observations were entirely isolated, there would be no science.

Nothing is destroyed until it is replaced.