If someone were to ask me for a synonym for "belief," I would be inclined to say, "doubt."
And if someone were to ask me for a synonym for "doubt," I would be inclined to say, "belief."
Same stuff, different spelling.
Philosophically, theologically or in other intellectual realms, this subject is pretty dumb -- meaning it could lead to a whole host of beard-stroking reactions.
But for spiritual endeavor purposes -- in the actual-factual, sit-down-and-focus-the-mind practical settings -- I think it is pretty important.
Check it out. See what happens where neither doubt nor belief enter.
It's worth a look, I'd say.