"Skepticism, like chastity, should not be relinquished too readily."

“Eternal vigilance is the price of knowledge.”

“American life is a powerful solvent. As it stamps the immigrant, almost before he can speak English, with an unmistakable muscular tension, cheery self-confidence and habitual challenge in the voice and eyes, so it seems to neutralize every intellectual element, however tough and alien it may be, and to fuse it in the native good-will, complacency, thoughtlessness, and optimism.”

“The soul, too, has her virginity and must bleed a little before bearing fruit.”

“It is not society's fault that most men seem to miss their vocation. Most men have no vocation.”

“Perhaps the only true dignity of man is his capacity to despise himself.”

“Beauty is a pledge of the possible conformity between the soul and nature, and consequently a ground of faith in the supremacy of the good.”