The period of iconoclasm had not then arrived, with immense zeal to throw discredit on the works of the earlier poets, and one could rejoice with undiminished pride in the lofty circle. In science, on the other hand, the really noblest of all—I mean natural science—had not as yet attained to the height, the influence, and the revolutionary effect on intellects which it has since won through the theory of evolution. Its application to spiritual and social phenomena was still unknown to me. I knew nothing then of social philosophy and sociology. To be sure, Darwin had already published his “Origin of Species”; the economic problems had already been propounded in the works of Lassalle and Engels; Buckle had already brought out his “Introduction to the History of Civilization”; the battle over Büchner’s “Force and Matter” was already on; Herbert Spencer’s principal works were already issued; yet thus far nothing of all this had reached me. I received with avidity whatever books told me of nature and human society as things existent, but I did not conceive them as things nascent; and, above all, I lacked the idea that social conditions are destined to become _different_ and that man with his eyes open can militantly coöperate toward this evolution. When the Franco-German War was ended we chanced to be sojourning in Berlin. My studies had brought me to the Prussian capital, for the reason that I desired to make some experiment also in the German method of singing. From an Unter den Linden balcony I saw the entrance of the victorious troops returning from France. The picture remains in my memory full of sunshine, enthusiasm, fluttering banners, scattered flowers, triumphal arches,—a lofty, historic festival of joy. How different would my impression of it be at the present time—but the history of this change will come much later. XIV PRINCE WITTGENSTEIN Duet practice and betrothal · Art journey and—end · Letters from Castle Wittgenstein Now follows another episode from the days of my youth,—again an engagement romance. When I say “days of my youth,” that is relative; for the romance ran its course during the summer of 1872, when I was already twenty-nine years old, and this age is not called “young” in a girl.