In an earlier edition of his biography and in some of his books and in about section, Zacharias claimed that he studied at the University of Cambridge and was a visiting professor at the University of Oxford. In multiple speaking engagements he said that he had taken a class in quantum mechanics under John Polkinghorne and while a visiting scholar at University of Cambridge he had heard Stephen Hawking lecture and saw him struggle between agnosticism and theism. Ravi Zacharias often claimed through his books and preaching that he was invited to be a visiting scholar at University of Cambridge, and while at Cambridge he focused his studies on Romantic writers and moralist philosophers.