Belle asked why he needed magic and Rumple said power.
It doesn’t mean that’s a bad thing. His statement that “magic is power” is true. We’ve seen that with Regina and with the Blue Fairy, who is supposed to the oldest power and the “good” power. The question is what does he plan to do with that power. Does he use it to find Bae (since that was the whole reason for the Dark Curse) or does he use like Regina did and attempt to control those without power/less power than he.
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"He was a lot of things to me" "The only conclusion was love"