Proof of the Existence of God (Unabridged) [Unabridged Fiction‪]‬

A psychological study masquerading as an experiment in time travel lures an undergraduate English major to volunteer. To the astonishment of the psychologists in charge of the study, he takes their instructions to heart - with horrific results.
Author James Patrick Kelly is a two-time winner of the Hugo Award and a 2007 Nebula Award winner. His stories appear frequently in Asimov's Science Fiction, and he writes the magazine's "On the Net" column. Publishers Weekly has called him "a meticulous craftsman in the demanding short-story form".