I laughed WAY too hard at this. Then I realized--Shopenhauer wrote his Fourfold dissertation at age 25. TWENTY-FIVE. I'm almost that age! I felt the sudden scramble to review my life, frantically searching for some sign that I have used my time with purpose, that my life has had value, that I had made a difference somewhere.
Then the tiny voice in my head started laughing at me. "Well, Self," she said, in a dry tone. "Might we even call this an... "existential crisis"? ba-doum *chhe*.."
Touche', dryly ironic mental alter-ego. Well played.