That must be really hard to be religious but also have it come up when you're manic

Is there a way for you to reconcile the two? Having it present in your MI but also knowing that it is true for you. There's a difference between thinking you're the chosen one (just an example lol) and praying for someone believing that the power of God will help them in some way. If your religious tendencies are getting in the way of your functioning then I'd worry about it, otherwise don't let having a MI tell you you're not strong in your faith.