The worth of a book is to be measured by what you can carry away from it.

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

The national park is the best idea America ever had.

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.

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

The worth of a book is to be measured by what you can carry away from it.

When you find that a book is poor ... waste no more time upon it.