Why do Dr. Albert and the narrator believe that “time” is the central theme of Ts’ui Pens novel in Borges’s “The Garden of Forking Paths”?

his tongue, i believe, was bloody and hanging out of his mouth.

he looked as if he were hungry.

he has several wolf-like qualities; a gray coat, sharp claws and yellow fangs.

those eyes made me feel, dear reader, like the end was near.

as i reached for a stick, he moved to the other side of the hill.

panting and hungry, he looked at me, a defenseless human and he snarled.

well i said my prayers, however, he simply turned and limped off. 

hasty generalization

you stated "which of the following" but i don't see anything else