Of all the differences between the Old World and the New, this is perhaps the most salient. Half the wars of Europe, half the internal troubles that have vexed European States... have arisen from theological differences or from the rival claims of Church and State. This whole vast chapter of debate and strife has remained virtually unopened in the United States. There is no Established Church. All religious bodies are equal before the law, and unrecognized by the law, except as voluntary associations of private citizens.

Medicine, the only profession that labors incessantly to destroy the reason for its own existence.

No government demands so much from the citizens as democracy and none gives back so much.

If you have enough room for your books, you don't have enough books.

California, more than any other part of the Union, is a country by itself, and San Francisco a capital.

To most people, nothing is more troublesome than the effort of thinking.

The presence of the blacks is the greatest evil that threatens the United States. They increase, in the Gulf States, faster than do the whites. They cannot be kept for ever in slavery, since the tendencies of the modern world run strongly the other way. They cannot be absorbed into the white population, for the whites will not intermarry with them, not even in the North where they have been free for two generations. Once freed, they would be more dangerous than now, because they would not long submit to be debarred from political rights. A terrible struggle would ensue.