An idea or institution may arise for one reason and be maintained for…

The sentiments attributed to Christ are in the Old Testament. They were familiar in the Jewish schools and to all the Pharisees, long before the time of Christ, as they were familiar in all the civilizations of the earth — Egyptian, …

Today we know not only that there is a terrible amount of disorder in the heavens — great catastrophes or conflagrations occur frequently — but evolution gives us a perfectly natural explanation of such order as there is. No distinguished …

A law of nature is not a formula drawn up by a legislator, but a mere summary of the observed facts — a "bundle of facts." Things do not act in a particular way because there is a law, but we state the "law" because they act in that way.

The theist and the scientist are rival interpreters of nature, the one retreats as the other advances.

The ability to imagine relations is one of the most indispensable conditions of all precise thinking. No subject can be named, in the investigation of which it is not imperatively needed; but it can nowhere else be so thoroughly acquired …

In science the credit goes to the man who convinces the world, not to the man to whom the idea first occurs. Not the man who finds a grain of new and precious quality but to him who sows it, reaps it, grinds it and feeds the world on it.