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

The heavens declare the glory of Kepler and Newton.

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.

Induction for deduction, with a view to construction.

Nothing is destroyed until it is replaced.

If we do not allow free thinking in chemistry or biology, why should we allow it in morals or politics?