Better to just give as much detail to the question possible. https://dontasktoask.com
Discussion
It's a passage where an old man rants about the meaning of life, roughly he says that it's really about finding the most beautiful mate you can and having kids with them, and that the people who don't do that end up angry and sad, but they won't know why. Could be from Cat's Cradle, or Slaughterhouse Five, but not sure
Maybe the unbearable lightness of being? That’s what google bard told me