Seeking thus to obtain a clear idea of the unifying principle out of which each of these two worlds is conceived, we find that mathematically-controlled cognition relates always (and the purer it is, the more directly) to a continuous present. The picture of nature dealt with by the physicist is that which is deployed before his senses at the given moment. It is one of the tacit, but none the less firm, presuppositions of nature-research that “Nature” (_die_ Natur) is the same for every consciousness and for all times. An experiment is decisive for good and all; time being, not precisely denied, but eliminated from the field of investigation. Real history rests on an equally certain sense of the contrary; what it presupposes as its origin is a nearly indescribable sensitive faculty within, which is continuously labile under continuous impressions, and is incapable therefore of possessing what may be called a centre of time.[83] (We shall consider later what the physicist means by “time.”) The picture of history—be it the history of mankind, of the world of organisms, of the earth or of the stellar systems—is a _memory_-picture. “Memory,” in this connexion, is conceived as a higher state (certainly not proper to every consciousness and vouchsafed to many in only a low degree), a perfectly definite kind of imagining power, which enables experience to traverse each particular moment _sub specie æternitatis_ as one point in an integral made up of all the past and all the future, and it forms the necessary basis of all looking-backward, all self-knowledge and all self-confession. In this sense, Classical man has no memory and therefore no history, either in or around himself. “No man can judge history but one who has himself experienced history,” says Goethe. In the Classical world-consciousness all Past was absorbed in the instant Present. Compare the entirely historical heads of the Nürnberg Cathedral sculptures, of Dürer, of Rembrandt, with those of Hellenistic sculpture, for instance the famous Sophocles statue. The former tell the whole history of a soul, whereas the latter rigidly confines itself to expressing the traits of a momentary being, and tells nothing of how this being is the issue of a course of life—if indeed we can speak of “course of life” at all in connexion with a purely Classical man, who is always complete and never becoming. ----- Footnote 79: “There are prime phenomena which in their godlike simplicity we must not disturb or infringe.” Footnote 80: The date of Napoleon’s defeat, and the liberation of Germany, on the field of Leipzig.—_Tr._ Footnote 81: See Vol. II, pp. 25 et seq., 327 et seq. Footnote 82: “All we see before us passing Sign and symbol is alone.” From the final stanza of Faust II (Anster’s translation).—_Tr._ Footnote 83: