THREE:An additional influence, not the less potent because unacknowledged, was the same craving for a principle of unity that had impelled early Greek thought to seek for the sole substance or cause of physical phenomena in some single material element, whether water, air, or fire; and just as these various principles were finally decomposed into the multitudinous atoms of Leucippus, so also, but much more speedily, did the general principle of knowledge tend to decompose itself into innumerable cognitions of the partial ends or utilities which action was directed to achieve. The need of a comprehensive generalisation again made itself felt, and all good was summed up under the head of happiness. The same difficulties recurred under another form. To define happiness proved not less difficult than to define use or practical knowledge. Three points of view offered themselves, and all three had been more or less anticipated by Socrates. Happiness might mean unmixed pleasure, or the exclusive cultivation of mans higher nature, or voluntary subordination to a larger whole. The founder of Athenian philosophy used to present each of these, in turn, as an end, without recognising the possibility of a conflict between134 them; and it certainly would be a mistake to represent them as constantly opposed. Yet a truly scientific principle must either prove their identity, or make its choice among them, or discover something better. Plato seems to have taken up the three methods, one after the other, without coming to any very satisfactory conclusion. Aristotle identified the first two, but failed, or rather did not attempt to harmonise them with the third. Succeeding schools tried various combinations, laying more or less stress on different principles at different periods, till the will of an omnipotent Creator was substituted for every human standard. With the decline of dogmatic theology we have seen them all come to life again, and the old battle is still being fought out under our eyes. Speaking broadly, it may be said that the method which we have placed first on the list is more particularly represented in England, the second in France, and the last in Germany. Yet they refuse to be separated by any rigid line of demarcation, and each tends either to combine with or to pass into one or both of the rival theories. Modern utilitarianism, as constituted by John Stuart Mill, although avowedly based on the paramount value of pleasure, in admitting qualitative differences among enjoyments, and in subordinating individual to social good, introduces principles of action which are not, properly speaking, hedonistic. Neither is the idea of the whole by any means free from ambiguity. We have party, church, nation, order, progress, race, humanity, and the sum total of sensitive beings, all putting in their claims to figure as that entity. Where the pursuit of any single end gives rise to conflicting pretensions, a wise man will check them by reference to the other accredited standards, and will cherish a not unreasonable expectation that the evolution of life is tending to bring them all into ultimate agreement."Why should I?" Isidore asked coolly. "They came to me through a third party for value received, so that they are quite good. When these notes are presented the bank is bound to cash them. I'd give sixpence to know what is behind that queer, clever, ingenious brain of yours."
1 5～2岁是儿童分享行为能力发展的关键期，父母要抓住这个时期，在日常生活中加以引导。教宝宝怎样与他人分享自己喜欢的东西。
