Read this article written by Robert Houghton on the OnIslam website.
Robert Houghton is a Catholic Christian. He studied English literature at Cambridge University in 1966, and taught English in an English grammar school for some years. He started publishing articles in the reviews and became a research associate in the Department of Comparative Religion at Manchester University. He was a visiting lecturer at the Catholic University of Leuven, Belgium and was appointed lecturer in English literature at the Taras Shevchenko University of Kiev, Ukraine.
Click the link to read the article:
http://www.onislam.net/english/reading-islam/research-studies/comparative-religion/442821.html