"I don't know a soul who doesn't maintain two separate lists of doctrines the ones that they believe that they believe; and the ones that they actually try to live by."

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I shall not fear to say that the doctrine of self-interest rightly understood seems to me of all the philosophic theories the most appropriate to the needs of men in our time, and that I see in it the most powerful guarantee against themselves that remains to them. The minds of the moralists of our day ought to turn, therefore, principally toward it. Even should they judge it imperfect, they would still have to adopt it as necessary.

— Alexis de Tocqueville