Need to read. Located here.
Preface to the Original Edition of 1943
The work presented here is not an ordinary book. It is pure wisdom. But one is no longer in the habit of looking at the practical world in the light of its most profound principles; except, perhaps, for those inverted thinkers who shake up the order of thought so that they might better thereafter disturb the real order, the political and moral order, and organize with an innocent air the most radical revolutions, those which finish by being altogether the most bloody and cynical. At the same time, good souls raise their hands with terror and scandal; but little by little they come to think like the revolutionaries, not noticing the equivocations hidden under seemingly acceptable formulas, nor noticing that such concession is a way of actually cooperating with the shedding of blood.