Is a Quest Better if it Helps Others?

I got an interesting question from Allan about the nature of quests:

I really enjoyed “The Happiness of Pursuit.” It appealed to the adventurer in me. I understand that you are encouraging others to pursue whatever quest they are passionate about, but my question is, “Do you notice that people who pursue quests that give something to others are more happy than quests for self interests?”

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I love this question, and I think the answer is two-fold. In the long-term, I do believe that most of us...