One must stop conducting research before one has finished. Otherwise, one will never stop and never finish.

It is wiser, I believe, to arrive at theory by way of evidence rather than the other way around.... It is more rewarding, in any case, to assemble the facts first and, in the process of arranging them in narrative form, to discover a theory or a historical generalization emerging of its own accord.

The open frontier, the hardships of homesteading from scratch, the wealth of natural resources, the whole vast challenge of a continent waiting to be exploited, combined to produce a prevailing materialism and an American drive bent as much, if not more, on money, property, and power than was true of the Old World from which we had fled.

Confronted by menace, or what is perceived as menace, governments will usually attempt to smash it, rarely to examine it, understand it, define it.

Without books, history is silent, literature dumb, science crippled, thought and speculation at a standstill. Without books, the development of civilization would have been impossible. They are engines of change, windows on the world, and (as a poet has said) "lighthouses erected in the sea of time." They are companions , teachers, magicians, bankers of the treasures of the mind. Books are humanity in print.

More than a code of manners in war and love, Chivalry was a moral system, governing the whole of noble life.

When every autumn people said it could not last through the winter, and when every spring there was still no end in sight, only the hope that out of it all some good would accrue to mankind kept men and nations fighting. When at last it was over, the war had many diverse results and one dominant one transcending all others: disillusion.