Labyrinths by Borges is freaking me out and blowing my mind

Including through the introduction to this book (I have the cool new directions edition with the shiny gray cover) I've learned that apparently everyone read Borges when they were 14 and it changed their life. Whatever. I'm old and just now reading him

What the fuck was going on in his mind? I consider myself a prose truther/prose style supremacist and I don't even care how these are written/translated, the mindfuck that happens in like every story and the strength of his ideas carry the whole thing.

How was a human being capable of coming up with this stuff? Tlön, Uqbar, Orbis Tertius - the Library of Babel – even the very brief Funes the Memorious are conceptually stunning. What on earth