I understand faith or not in a possible God.
"Anselm's argument was not presented in order to prove God's existence;
rather, Proslogion was a work of meditation in which he documented how the
idea of God became self-evident to him."
http://en.wikipedia.org/wiki/Ontological_argument#Anselm
http://en.wikipedia.org/wiki/Proslogion
PS: it's brought up in chap. eight of Adler's book.