I can be free only to the extent that others are forbidden to profit from their physical, economic, or other superiority to the detriment of my liberty.

Religious phenomena are naturally arranged in two fundamental categories: beliefs and rites. The first are states of opinion, and consist in representations; the second are determined modes of action.

When mores are sufficient, laws are unnecessary. When mores are insufficient, laws are unenforceable.

At this point, an urgent question arises: [...] Is it our duty to seek to become a thorough and complete human being, one quite sufficient unto himself; or, on the contrary, to be only a part of a whole, the organ of an organism? Briefly, is the division of labor, at the same time that it is a law of nature, also a moral rule of human conduct; and, if it has this latter character, why and in what degree?

I can be free only to the extent that others are forbidden to profit from their physical, economic, or other superiority to the detriment of my liberty.

Too cheerful a morality is a loose morality; it is appropriate only to decadent peoples and is found only among them.

A monomaniac is a sick person whose mentality is perfectly healthy in all respects but one; he has a single flaw, clearly localized. At times, for example, he has an unreasonable and absurd desire to drink or steal or use abusive language; but all his other acts and all his other thoughts are strictly correct.