"There is a law of gratitude, and it is . . . the natural principle that action and reaction are always equal and in opposite directions. The grateful outreaching of your mind in thankful praise to supreme intelligence is a liberation or expenditure of force. It cannot fail to reach that to which it is addressed, and the reaction is an instantaneous movement toward you."

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Wolves which batten upon lambs, lambs consumed by wolves, the strong who immolate the weak, the weak victims of the strong: there you have Nature, there you have her intentions, there you have her scheme: a perpetual action and reaction, a host of vices, a host of virtues, in one word, a perfect equilibrium resulting from the equality of good and evil on earth.

— Marquis de Sade