We go by the major vote, and if the majority are insane, the sane must go to the hospital.

If there is anything for which I would go back to childhood, and live this weary life over again, it is for the burning, exalting, transporting thrill and ecstasy with which the young faculties hold their earliest communion with knowledge.

Observation - activity of both eyes and ears.

There is nothing so costly as ignorance.

Scientific truth is marvelous, but moral truth is divine and whoever breathes its air and walks by its light has found the lost paradise.

It is well, when the wise and the learned discover new truths; but how much better to diffuse the truths already discovered, amongst the multitude! Every addition to true knowledge is an addition to human power; and while a philosopher is discovering one new truth, millions may be propagated amongst the people. Diffusion, then, rather than discovery, is the duty of our government.

Deeds survive the doers.