The Aleph and Other Stories

I'm curious about the selection process—were these stories chosen for their themes, writing style, or personal significance to Borges? Did he see this collection as a cohesive whole or a tapestry of different ideas?

Many tales in this collection seem to push the boundaries of what we consider real or possible. Did any particular story make you question what you believe is true?

The idea is so vivid and surreal—I'm wondering if it was influenced by philosophical or literary sources, or if it was purely a product of Borges's imagination.