When belief is placed in that fire, the impurities are burned off and what is left is faith. Faith is not afraid of questions or challenge. It is not concerned with convincing. Faith is absolute. It is the substratum of the relative world of belief.
Faith is what is left when what can be stripped away, is.
In that, what we come to is not faith in the divine, rather what we come to is the divine. The only thing we will get by questioning our beliefs is very tired. It is not being suggested that we acquire a new belief about finding faith by questioning. It is not a mechanical process by which we get from belief to faith in ten easy steps. It is not an intellectual process of methodically questioning.