To help with depression I recommend doing being self indulgent, getting a hobby, or learning a useful skill. Also volunteering could help. If you think this world is a bad place, make it better for at least one person. Convincing yourself that you or life in general hopeless is the worst thing you could do.
I prefer not to talk about existentialism, and I'm not going to read about "gifted children."
I prefer not to talk about existentialism, and I'm not going to read about "gifted children."