Irrationally held truths may be more harmful than reasoned errors.

Genius, as an explosive power, beats gunpowder hollow.

There is no sadder sight in the world than to see a beautiful theory killed by a brutal fact.

Education is the instruction of the intellect in the laws of Nature.

What men need is, as much knowledge as they can assimilate and organize into a basis for action; give them more and it may become injurious. One knows people who are as heavy and stupid from undigested learning .

The antagonism between science and religion, about which we hear so much, appears to me to be purely factitiousfabricated, on the one hand, by short-sighted religious people who confound a certain branch of science, theology, with religion; and, on the other, by equally short-sighted scientific people who forget that science takes for its province only that which is susceptible of clear intellectual comprehension; and that, outside the boundaries of that province, they must be content with imagination, with hope, and with ignorance

The more rapidly truth is spread among mankind the better it will be for them. Only let us be sure that it is the truth.