Every believer is going to doubt God at some point. There will be times where your faith in Him wavers, even just for a moment. That isn’t sinful behavior, and God isn’t going to look poorly on you because of it. But Pastor Jeff warns you to not confuse doubt and unbelief, because unbelief is the thing that can begin to rot away at your relationship with God. You don’t sin when you doubt God’s goodness or doubt God’s word. You sin when you hear God’s word proclaimed and reject it completely.