2. _Happiness is an act, not a state_. That is to say, the happiness of man does not lie in his having something done to him, nor in his being habitually able to do something, but in his actually doing something. "To be up and doing," that is happiness,--[Greek: en to zaen kai energein]. (Ar., _Eth._, IX., ix., 5.) This is proved from the consideration that happiness is the crown and perfection of human nature; but the perfection of a thing lies in its ultimate act, or "second act," that is, in its not merely being able to act, but acting. But action is of two sorts. One proceeds from the agent to some outward matter, as cutting and burning. This action cannot be happiness, for it does not perfect the agent, but rather the patient. There is another sort of act immanent in the agent himself, as feeling, understanding, and willing: these perfect the agent. Happiness will be found to be one of these immanent acts. Furthermore, there is action full of movement and change, and there is an act done in stillness and rest. The latter, as will presently appear, is happiness; and partly for this reason, and partly to denote the exclusion of care and trouble, happiness is often spoken of as _a rest_. It is also called _a state_, because one of the elements of happiness is permanence. How the act of happiness can be permanent, will appear hereafter. 3. _Happiness is an act in discharge of the function proper to man, as man_. There is a function proper to the eye, to the ear, to the various organs of the human body: there must be a function proper to man as such. That can be none of the functions of the vegetative life, nor of the mere animal life within him. Man is not happy by doing what a rose-bush can do, digest and assimilate its food: nor by doing what a horse does, having sensations pleasurable and painful, and muscular feelings. Man is happy by doing what man alone can do in this world, that is, acting by reason and understanding. Now the human will acting by reason may do three things. It may regulate the passions, notably desire and fear: the outcome will be the moral virtues of temperance and fortitude. It may direct the understanding, and ultimately the members of the body, in order to the production of some practical result in the external world, as a bridge. Lastly, it may direct the understanding to speculate and think, contemplate and consider, for mere contemplation's sake. Happiness must take one or other of these three lanes.