I am a fan of Rational Wiki's definition of faith. Essentially, it is something that you can use to back up the belief in something. Evidence is also somethin

I am a fan of Rational Wiki's definition of faith. Essentially, it is something that you can use to back up the belief in something. Evidence is also something that you use to back up a belief. You can more or less plug in either of them, but evidence has clear advantages. http://rationalwiki.org/wiki/Faith http://rationalwiki.org/wiki/Faith This article explores thoughts on faith that I don't agree are useful, but the opening sentence is the most useful definition I've seen.