As soon as those two comforting expedients--that of Plato and that of Muhammed--have been overthrown, and no thinker can any longer relieve his conscience with the hypothesis "God" or "eternal values," the claim of the lawgiver to determine new values rises to an awfulness which has not yet been experienced. Now those elect, on whom the faint light of such a duty is beginning to dawn, try and see whether they cannot escape it--as their greatest danger--by means of a timely side-spring: for instance, they try to persuade themselves that their task is already accomplished, or that it defies accomplishment, or that their shoulders are not broad enough for such burdens, or that they are already taken up with burdens closer to hand, or even that this new and remote duty is a temptation and a seduction, drawing them away from all other duties; a disease, a kind of madness. Many, as a matter of fact, do succeed in evading the path appointed to them: throughout the whole of history we can see the traces of such deserters and their guilty consciences. In most cases,, however, there comes to such men of destiny that hour of delivery, that autumnal season of maturity, in which they are forced to do that which they did not even "wish to do": and that deed before which in the past they have trembled most, falls easily and unsought from the tree, as an involuntary deed, almost as a present. 973. _The human horizon._--Philosophers may be conceived as men who make the greatest efforts to _discover_ to what extent man can _elevate_ himself--this holds good more particularly of Plato: how far man's _power_ can extend. But they do this as individuals; perhaps the instinct of Cæsars and of all founders of states, etc., was greater, for it preoccupied itself with the question how far man could be urged forward in _development_ under "favourable circumstances." What they did not sufficiently understand, however, was the nature of favourable circumstances. The great question: "Where has the plant 'man' grown most magnificently heretofore? In order to answer this, a comparative study of history is necessary. 974. Every fact and every work exercises a fresh persuasion over every age and every new species of man. History always enunciates new truths. 975.