To what stage in the development just outlined the present book belongs (or is assigned) is something that will be hidden from no augur or psychologist for an instant. But where are there psychologists to-day? In France, certainly; in Russia, perhaps; certainly not in Germany. Grounds are not wanting, to be sure, upon which the Germans of to-day may adduce this fact to their credit: unhappily for one who in this matter is fashioned and mentored in an un-German school! This _German_ book, which has found its readers in a wide circle of lands and peoples--it has been some ten years on its rounds--and which must make its way by means of any musical art and tune that will captivate the foreign ear as well as the native--this book has been read most indifferently in Germany itself and little heeded there: to what is that due? "It requires too much," I have been told, "it addresses itself to men free from the press of petty obligations, it demands fine and trained perceptions, it requires a surplus, a surplus of time, of the lightness of heaven and of the heart, of otium in the most unrestricted sense: mere good things that we Germans of to-day have not got and therefore cannot give." After so graceful a retort, my philosophy bids me be silent and ask no more questions: at times, as the proverb says, one remains a philosopher only because one says--nothing! Nice, Spring, 1886. OF THE FIRST AND LAST THINGS. 1 =Chemistry of the Notions and the Feelings.=--Philosophical problems, in almost all their aspects, present themselves in the same interrogative formula now that they did two thousand years ago: how can a thing develop out of its antithesis? for example, the reasonable from the non-reasonable, the animate from the inanimate, the logical from the illogical, altruism from egoism, disinterestedness from greed, truth from error? The metaphysical philosophy formerly steered itself clear of this difficulty to such extent as to repudiate the evolution of one thing from another and to assign a miraculous origin to what it deemed highest and best, due to the very nature and being of the "thing-in-itself." The historical philosophy, on the other hand, which can no longer be viewed apart from physical science, the youngest of all philosophical methods, discovered experimentally (and its results will probably always be the same) that there is no antithesis whatever, except in the usual exaggerations of popular or metaphysical comprehension, and that an error of the reason is at the bottom of such contradiction. According to its explanation, there is, strictly speaking, neither unselfish conduct, nor a wholly disinterested point of view. Both are simply sublimations in which the basic element seems almost evaporated and betrays its presence only to the keenest observation. All that we need and that could possibly be given us in the present state of development of the sciences, is a chemistry of the