Even in commerce, which is now the main occupation of mankind, and one in which there is a ready test of success and failure wanting in many higher pursuits, the same disposition to excessive action is very apparent to careful observers. Part of every mania is caused by the impossibility to get people to confine themselves to the amount of business for which their capital is sufficient, and in which they can engage safely. In some degree, of course, this is caused by the wish, to get rich; but in a considerable degree, too, by the mere love of activity. There is a greater propensity to action in such men than they have the means of gratifying. Operations with their own capital will only occupy four hours of the day, and they wish to be active and to be industrious for eight hours, and so they are ruined. If they could only have sat idle the other four hours, they would have been rich men. The amusements of mankind, at least of the English part of mankind, teach the same lesson. Our shooting, our hunting, our travelling, our climbing have become laborious pursuits. It is a common saying abroad that 'an Englishman's notion of a holiday is a fatiguing journey;' and this is only another way of saying that the immense energy and activity which have given us our place in the world have in many cases descended to those who do not find in modern life any mode of using that activity, and of venting that energy. Even the abstract speculations of mankind bear conspicuous traces of the same excessive impulse. Every sort of philosophy has been systematised, and yet as these philosophies utterly contradict one another, most of them cannot be true. Unproved abstract principles without number have been eagerly caught up by sanguine men, and then carefully spun out into books and theories, which were to explain the whole world. But the world goes clear against these abstractions, and it must do so, as they require it to go in antagonistic directions. The mass of a system attracts the young and impresses the unwary; but cultivated people are very dubious about it. They are ready to receive hints and suggestions, and the smallest real truth is ever welcome. But a large book of deductive philosophy is much to be suspected. No doubt the deductions may be right; in most writers they are so; but where did the premises come from? Who is sure that they are the whole truth, and nothing but the truth, of the matter in hand? Who is not almost sure beforehand that they will contain a strange mixture of truth and error, and therefore that it will not be worth while to spend life in reasoning over their consequences? In a word, the superfluous energy of mankind has flowed over into philosophy, and has worked into big systems what should have been left as little suggestions.