If a man cannot do brain work without stimulants of any kind, he had better turn to hand work it is an indication on Nature's part that she did not mean him to be a head worker.

Teach a man to read and write, and you have put into his hands the great keys of the wisdom-box.

God give me strength to face a fact though it slay me.

People may talk about intellectual teaching, but what we principally want is the moral teaching.

The dogma of the infallibility of the Bible is no more self-evident than is that of the infallibility of the popes.

To a clear eye the smallest fact is a window through which the infinite may be seen.

It is given to few to add the store of knowledge, to strike new springs of thought, or to shape new forms of beauty. But so sure as it is that men live not by bread, but by ideas, so sure is it that the future of the world lies in the hands of those who are able to carry the interpretation of nature a step further than their predecessors.