I used to pre-rehearse everything and then bring my pre-rehearsed performance to the set. Now, I'm learning to let it happen in the moment. American actors are much better at that than British actors. If I knew how to trust myself, I would have been much more relaxed. Maybe I would have less gray hairs today.
Put your nose into the Bible everyday. It is your spiritual food. And then share it. Make a vow not to be a lukewarm Christian.