Aristotle found that more than anything else sought by humans was happiness. Happiness is sought after for it’s own sake, other goals like health, wealth, and success are valued on the level of how much more happiness we will have.
“Happiness is not something that happens. It does not depend on outside events, but, rather on how we interpret them. Happiness… is a condition that must be prepared for, cultivated, and defended privately by each person” – Csikszentmihalyi
People who learn to control their inner experience are able to determine the quality of their lives and come as close to happiness as anyone can.