Faith is another of those things that people can mean all kinds of different things when they say it. For me, faith is what make it possible to be okay with the things I can't know for sure. It isn't confidence in my beliefs, and that is what most people seem to tell me it is. Beliefs will naturally shift when you have different experiences, and beliefs will decide what kinds of experiences you can have. Most people start out as children with all kinds of strange things they believe, and these beliefs fall away naturally. Most people stop growing up in their early teens and just grow older, unfortunately. If your idea of faith is that it is the glue holding your beliefs together, I can see why it would be a problem to have your beliefs disrupted suddenly.