In the beginning of the sequel, Jacob doubted himself to be able to keep all of the children safe for he doesn't know how to completely use his peculiarity. As the story progresses, his peculiarity develops the more he uses it. While he was deciding whether to leave the children and go back to his normal life or not, he was sleep walking where at the end of his dream, Abraham reveals to him "Don't fight the pain, that's the key..It's telling you something. Welcome it, let it speak to you. The pain says: Hello, I am not other than you; I am of the hollow, but I am you also.". At the end of the sequel, when Jacob was about to be eaten by the hollow that followed him, Emma and Addison after they escaped from the wights. He thought to himself that we was as good as dead and he couldn't do anything else but to just stop fighting. Then a strange thing happened, the pain shifted and became something else. He has discovered something quiet and gentle. That is when Jacob realized that he could control the hollows as long as he stays calm and concentrated.