Board Thread:What If?/@comment-5674726-20141111205211/@comment-5674726-20150102221749

I think that a lot would depend on how Uther treated the issue of Morgana having magic.

In canon, she was taught to think of magic as an evil that corrupted the soul and she resisted those teachings, especially after learning that she had magic, to the point where she took the opposite extreme and seems to have been operating on the assumption that all magic users were good, only doing bad things if they were driven to it by the persecution that they were subjected to, and that she could trust that they wished her well. This led her to place her trust in people like Alvarr and Morgause, with terrible consequences for herself and others.

If Uther taught her that her magic was evil and that she could only hope to avoid corruption if she never used it, I think that it would have driven her away, especially because her Seer power is involuntary. Even if she wanted to suppress her magic as a child so she could be good, as an adult, she could question Uther's teachings more and more, and come to hate him for telling her that there was something wrong with her. Alternatively, she might have turned on herself and become anxious and depressed, even suicidal, over her inability to suppress her magic, believing that she was doomed to be evil because she couldn't control it.

However, if Uther took a different approach and told her that, while magic would corrupt virtually everybody else, she was an exception to the rule because she was too pure of heart to be touched by evil influence (or something along those lines) it could play out very differently. I could see him wanting to believe that this was true as it would allow him to reconcile his hatred of magic with the fact that the daughter he loved had magic. He could tell her that she needed to keep her magic a secret because, while he knew that she was good, other people might not understand that magic wasn't going to corrupt her the way it corrupted everybody else. That could lead to an improved relationship between the two.