Men, individually and in common, nearly all have some aim, in the attainment of which they choose or avoid certain things. This aim, briefly stated, is happiness and its component parts. Therefore, for the sake of illustration, let us ascertain what happiness, generally speaking, is, and what its parts consist in; for all who exhort or dissuade discuss happiness and the things which conduce or are detrimental to it. For one should do the things which procure happiness or one of its parts, or increase instead of diminishing it, and avoid doing those things which destroy or hinder it or bring about what is contrary to it.
Let us then define happiness as well-being combined with virtue, or independence of life, or the life that is most agreeable combined with security, or abundance of possessions and slaves, combined with power to protect and make use of them; for nearly all men admit that one or more of these things constitutes happiness. If, then, such is the nature of happiness, its component parts must necessarily be: noble birth, numerous friends, good friends, wealth, good children, numerous children, a good old age; further, bodily excellences, such as health, beauty, strength, stature, fitness for athletic contests, a good reputation, honor, good luck, virtue. For a man would be entirely independent, provided he possessed all internal and external goods; for there are no others. Internal goods are those of mind and body; external goods are noble birth, friends, wealth, honor. To these we think should be added certain capacities and good luck; for on these conditions life will be perfectly secure.
[Aristotle, Rhetoric 1.5.1-4]
