Mr. Csikszentmihalyi（チクセントミハイ）, a psychologist and author of "The Evolving Self", says
that we should search for a middle-of-the-road way to strike a balance between "guarantee of our
living" and "challenge in our lives".
that we should search for a middle-of-the-road way to strike a balance between "guarantee of our
living" and "challenge in our lives".
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