He didn’t know until later on in his life the man that stared back at him in the mirror every morning was destined to be a her. She peered out from behind him hidden in the dark shadows waiting for him to take notice of her. She was patient and let him take his time realizing who he was born to be.
If you ask him, he will tell you, there were signs along the way but nothing that stood out drastically. He never fully realized that he wasn’t living his authentic self, but as the signs grew stronger, he started to pay attention to them.