Full Idea
There is a distinction between belief in a set of propositions and a faith which enables us to put our trust in them.
Gist of Idea
Faith is not just belief in propositions, but also putting trust in them
Source
Karen Armstrong (A History of God [1993], Intro)
Book Reference
Armstrong,Karen: 'A History of God' [Mandarin 1993], p.1
A Reaction
This is interestingly distinct from the usual idea that faith is putting belief in propositions which are not sufficiently rationally justified. How many philosophers actually have faith in the propositions they say they believe?