I think it's telling that when a person of faith experiences doubt, it's characterized as a "crisis of faith", and successfully navigating that crisis means moving past the doubt. I also think a neat definition of "faith" is not "belief in the absence of evidence", but rather it's "belief, regardless of the evidence." We have a lot of evidence regarding religious claims. Where empirical evidence has become too big to ignore, religious faith has retreated and evaporated (e.g. religions today no longer address the nature or meaning of natural phenomena like lightning and floods), and where the circumstantial evidence weighs heavily against the claim (e.g. the benevolence of God), people of faith just choose to ignore it (e.g. "God works in mysterious ways" or "God has a plan for us" or something equally vague are the only answers to why He allows the slaughter of children).