Wilson knew how much he wanted to be with Clara even though he had lost his past feelings for her.
Fear began to consume him although he had finally realized his dream. He was scared his happiness would be short-lived. He was afraid she would unintentionally tell him the secret phrase. It might change their relationship.
Sometimes, he secretly mocked himself for setting up the secret phrase related to her. To release him from the hypnosis, she had to tell him the secret phrase in person.
May