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.
It is interesting to compare this account of Happiness with Mill's in Utilitarianism. Mill's is much the less consistent: at times he distinguishes and at times he identifies, happiness, pleasure, contentment, and satisfaction. He wavers between belief in its general attainability and an absence of hopefulness. He mixes up in an arbitrary way such ingredients as "not expecting more from life than it is capable of bestowing," "mental cultivation," "improved laws," etc., and in fact leaves the whole conception vague, blurred, and uncertain. Aristotle draws the outline with a firmer hand and presents a more definite ideal. He allows for the influence on happiness of conditions only partly, if at all, within the control of man, but he clearly makes the man positive determinant of man's happiness lie in himself, and more particularly in what he makes directly of his own nature, and so indirectly of his circumstances. "'Tis in ourselves that we are thus or thus." But once more this does not involve an artificial or abstract isolation of the individual moral agent from his relation to other persons or things, from his context in society and nature, nor ignore the relative dependence of his life upon a favourable environment.
The main factor which determines success or failure in human life is the acquisition of certain powers, for Happiness is just the exercise or putting forth of these in actual living; everything else is secondary and subordinate.