Alma 32:21 "And now as I said concerning faith--faith is not to have a perfect knowledge of things; therefore if ye have faith ye hope for things which are not seen, which are true."
Many will pose the question of faith demonstrated by people, in things that aren't true. What of idol worshippers, for example? When I first thought on this I couldn't see Alma's point either. But further consideration brought me to a new understanding. An extremist in some religions will give his life for his God. He does this feeling he will be saved by his God, for his valiant effort and sacrifice. But is Alma correct that this isn't faith at all?
I believe he is right. When a person deliberately denies reality and sets focus in one direction, is that true faith? It is only when a person faces his deepest feelings of doubt and is satisfied, that true faith can exist. In other words "blind faith" isn't faith, but just intelligence washing. We come to have faith in God because we try his suggestion and find it works. We eventually come to see that he is a reliable source of correct ideas. But each idea requires us to use our faith in him to actually follow it. Once we follow it, and see it working our faith grows even further.