The most considerable difference I note among men is not in their readiness to fall into error, but in their readiness to acknowledge these inevitable lapses.

Teach a child what is wise, that is morality. Teach him what is wise and beautiful, that is religion!

To persons uninstructed in natural history, their country or seaside stroll is a walk through a gallery filled with wonderful works of art, nine-tenths of which have their faces turned to the wall.

Size is not grandeur, and territory does not make a nation.

Learn what is true in order to do what is right.

Nothing great in science has ever been done by men, whatever their powers, in whom the divine afflatus of the truth-seeker was wanting.

The scientific imagination always restrains itself within the limits of probability.