I believe in a religion different from my parents. I know that if they knew, they would be heartbroken and angry. I have chosen not to tell them because A) It would drive a deep wedge in a currently excellent relationship B) I don’t feel that my spiritual beliefs are any of their business, and C) I don’t attend religious services of any kind, so my beliefs are truly privately held, so I don’t feel a need to tell people who don’t understand them. Sometimes I feel that I may be a coward and a hypocrite about this matter, but I know that my silence is preventing a lot of harm. I’m not saying that I recommend my choice, just that I wanted to share this with you. Good luck to you. I don’t think your wish to tell your father is wrong, just that you should be prepared for fallout if you tell him.