"Studies of people who report high well-being in their fifties and sixties indicate that they have lived lives that involved personal risks. They are not people whose lives have been calm and predictable. A life under tight control sometimes produces quiet desperation. High well-being is a life that has depth and quality. Risks, losses, problems, and tragedy add pain to a life. That pain becomes a teacher. We learn; the pain gives us no choice."
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Source : Jennifer James (1986). “Success Is the Quality of Your Journey”, William Morrow Paperbacks