You may or may not have chosen to be born, but all indications point to "acting like you did"--i.e., injecting your own existence with meaning by assuming you had a purpose for coming--being more beneficial to your well-being than a more nihilistic attitude.
http://yourmeaninginlife.com/blog/you-didnt-choose-to-be-bornbut-should-you-act-like-you-did
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The problem with any behavior is whether someone unwillingly is harmed or pays the cost of another person’s behavior—not who benefits. Therefore, both selfishness and altruism can be bad if it someone else ends up being harmed or paying for it.
https://yourmeaninginlife.com/blog/non-consensual-harm-or-expense-vs-the-greater-good
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You don't have to save the world; your life and world get better one day at a time with every constructive act you take.
https://yourmeaninginlife.com/blog/you-dont-have-to-save-the-world
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You can always find a reason to complain, and you can always find a reason to be grateful. The former will lead to a miserable life; the latter will lead to a more pleasant life.
https://yourmeaninginlife.com/blog/it-will-always-be-something
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