Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own.

Love and knowledge led upwards to the heavens.

Americans need rest, but do not know it.

Collective fear stimulates herd instinct, and tends to produce ferocity toward those who are not regarded as members of the herd.

Be scrupulously truthful, even if the truth is inconvenient, for it is more inconvenient when you try to conceal it.

When the state intervenes to insure the indoctrination of some doctrine, it does so because there is no conclusive evidence in favor of that doctrine.

Almost everything that distinguishes the modern world from earlier centuries is attributable to science, which achieved its most spectacular triumphs in the seventeenth century.