http://psychclassics.yorku.ca/James/Principles/prin6.htm which is discussed in http://thomism.wordpress.com/2013/09/28/athanasiuss-cosmological-argument/ Where the blogger says, " Athanasius’s: If diverse things form a single reality,* there is some cause separate from them. The best defense of this premise is, oddly enough, in Chapter VI of William James’s Psychology “ On the Mind-Stuff Theory ” (it’s also in Volume 53 in the Great Books series). James uses it to show that, despite all the best efforts to the contrary, psychology has to posit the existence of a soul separate from all mental reality; though the same premise gets us Athanasius’s conclusion that we need some being separate from all natural or noumenal reality ." Nice!
Commentary and discussion regarding science, faith and culture by Leo White