People who learn to control inner experience will be able to determine their quality of lives which is as close as any of us can come to being happy

Mihaly Csikszentmihalyi claims that "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."⠀⠀⠀⠀⠀⠀⠀⠀⠀
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What thoughts does this trigger in you?