I’m with Hjbau, it is all about what gets Mr. Gold the farthest in his plan. I think he knows Emma has power, but notice he is not helping her find out the truth, he is letting her discover it other ways, so he is not eager to have another power player to contend with at this point. I can’t believe he is on Regina’s side at all, knowing the rivalry between them in FTL although they obviously consulted one another. Regina did nothing to help him when he was imprisoned. She is totally about herself and everyone’s unhappiness, which is her victory as I recall from the pilot. Mr. Gold is also about himself and his agenda and whatever it takes to further it to get there. If it is in his best interest he will side with Regina while it suits him or Emma, but it’s all about his best interest. Our problem is that we don’t know exactly what Mr. Gold’s agenda is… we just keep theorizing. Forum writer Phee has written a theory that suggests perhaps Mr. Gold’s agenda is to be free from his curse and all magic. I like that idea, but it’s still just a theory.