Laws and principles are not for the times when there is no temptation: they are for such moments as this, when body and soul rise in mutiny against their rigour; stringent are they; inviolate they shall be. If at my individual convenience I might break them, what would be their worth?
I like persons better than principles, and I like persons with no principles better than anything else in the world.
Act only in accordance with that maxim through which you can at the same time will that it become a universal law.[Handle so, als ob deine Maxime zugleich zum allgemeinen gesetze (aller vernünftigen Wesen) dienen sollte.]