Apparently from a poem: https://news.ycombinator.com/item?id=31278566

That comment is from the submitter of the issue (and HN post), the poem is from Eliza Callahan (copy found here): https://durationandthebodyelizacallahan.cargo.site

The relevant excerpt: "I thought about my body. It’s past. It’s present… Which made me think about the word and. And. And. And. And. And. Then."