In what then does happiness consist? Aristotle summarily sets aside the more or less popular identifications of it with abundance of physical pleasures, with political power and honour, with the mere possession of such superior gifts or attainments as normally entitle men to these, with wealth. None of these can constitute the end or good of man as such. On the other hand, he rejects his master Plato’s conception of a good which is the end of the whole universe, or at least dismisses it as irrelevant to his present enquiry. The good towards which all human desires and practical activities are directed must be one conformable to man’s special nature and circumstances and attainable by his efforts. There is in Aristotle’s theory of human conduct no trace of Plato’s “other worldliness”, he brings the moral ideal in Bacon’s phrase down to “right earth”—and so closer to the facts and problems of actual human living. Turning from criticism of others he states his own positive view of Happiness, and, though he avowedly states it merely in outline his account is pregnant with significance. Human Happiness lies in activity or energising, and that in a way peculiar to man with his given nature and his given circumstances, it is not theoretical, but practical: it is the activity not of reason but still of a being who possesses reason and applies it, and it presupposes in that being the development, and not merely the natural possession, of certain relevant powers and capacities. The last is the prime condition of successful living and therefore of satisfaction, but Aristotle does not ignore other conditions, such as length of life, wealth and good luck, the absence or diminution of which render happiness not impossible, but difficult of attainment.