The opposite of faith is not doubt, it is indifference. Doubt is the friction of someone still engaged, still expecting the thing to matter. The scriptures are more comfortable with this than most congregations. Job argues at length and is not struck down. Habakkuk complains that God's methods are indefensible. The psalmists accuse God of sleeping. Thomas demands physical evidence and - the part usually skipped - is given it rather than shamed out of the room. The father in Mark's gospel says, I believe, help my unbelief - not a contradiction but an accurate description of how belief behaves in most people.

What damages faith is rarely the question; it is isolation with it. Doubt carried in a community that will not panic tends to mature into something sturdier. Doubt that is hidden, or punished when it surfaces, tends to end in a quiet exit - the person who stopped attending at twenty-nine usually left internally years before their seat went empty.

Two practices help. Interrogate the specific question rather than the entire edifice: most doubt is one or two live issues - suffering, hell, science, the behaviour of leaders - not a general collapse. Name yours precisely, then read the serious people who have wrestled with that exact thing, including those you disagree with. And separate God from the people who represented him badly: much of what gets called losing faith is unprocessed grief about a leader.