I think what we’re going to get with that scene is love is strength. It makes sense now considering that the way learned magic from Rumple and from Cora, she was taught that love is weakness. But what if Regina uses the opposite with Emma? Instead, she teaches her that love is strength and that’s what helps Emma to embrace her magic and seriously, what better metaphor than use Hook as love, to help Emma realize her magic?.
what if the scene plays out like this:
It would seriously be amazing if the way Regina teaches Emma magic, she says, ‘Conjuring magic is not intellectual endeavor. It’s emotion. You must ask yourself, ‘why am I doing this? Who am I protecting?’ Feel it.” and she also says, “Magic, the kind of magic you are, is strength because love, true love is strength.” And the image of Hook coming to save her, is what gives Emma strength to help save herself.
It also goes along perfectly with this meta I just found.