"We talked into the heart of the night," This personification, the night does not have a heart. "Each sentence was a new territory, like a door someone was rushing into, the glass shattering with delirium," This is a simile, the author is comparing a sentence to someone rushing into a door. "fear" and "disappear" This is an example of assonance. "Perhaps she thought it was the only way she could reach me, sending me away to speak in the underworld." This would be a metaphor. "Stay where I can reach you, the dim room, the dark earth." This is also a metaphor.
