"You believe in the truth," the spirit said. "And the truth is, I was never born, Sherlock. I am the shadow of the cases you refused to take because they were 'too simple.' I am the girl you didn't save in '82. I am the doubt you bury under logic." She stepped closer, the sapphire dissolving into smoke.
"I do not believe in you," Holmes said, though his eyes were wide. Sherlock ][ Believer
"She’s been there three nights, Holmes," Watson replied, standing by the heavy velvet curtains. "She looks like she’s trying to tell you something." "You believe in the truth," the spirit said