Board Thread:General Discussion/@comment-26340222-20151025182844/@comment-26116863-20151025200758

Ok, just wondering.

But could they "think it away", as Emma did when she went horseback riding with Killian, only for good?

It seems that her mental state does have some effect on the darkness. The apparition leaves for good when she's fully accepted it, or temporarily when she forgets about it.