As long as we respond predictably to what feels good and what feels bad, it is easy for others to exploit our preferences for their own ends.

Enjoyment appears at the boundary between boredom and anxiety, when the challenges are just balanced with the person's capacity to act.

I have devoted 30 years of research to how creative people live and work, to make more understandable the mysterious process by which they come up with new ideas and new things. [...] If I had to express in one word what makes their personalities different from others, it's complexity. They show tendencies of thought and action that in most people are segregated. They contain contradictory extremes; instead of being an "individual", each of them is a "multitude".

What I "discovered" was that happiness is not something that happens. It is not the result of good fortune or random chance. It is not something that money can buy or power command. It does not depend on outside events, but, rather, on how we interpret them. Happiness, in fact, is a condition that must be prepared for, cultivated, and defended privately by each person. People who learn to control inner experience will be able to determine the quality of their lives, which is as close as any of us can come to being happy.

It is how people respond to stress that determines whether they will profit from misfortune or be miserable.

But to change all existence into a flow experience, it is not sufficient to learn merely how to control moment-by-moment states of consciousness. It is also necessary to have an overall context of goals for the events of everyday life to make senseTo create harmony in whatever one does is the last task that the flow theory presents to whose who wish to attain optimal experience; it is a task that involves transforming the entirety of life into a single flow activity, with unified goals that provide constant purpose.

Those periods of struggling to overcome challenges are what people find to be the most enjoyable times.