“That's incredible,” Robert exclaims, holding the marble up to
his eye. “How did you do that?”
“I did nothing,” Tom replies, “It was all you.”
“I want to do it again,” Robert says, “Can we do it again?”
“Try for something different,” Tom tells him, “Try for a pen.”
Robert closes his eyes in concentration, imagining what a pen would
feel like in his hand. He frowns, clenching his hand ever tighter,
his whole body tense, but try as he might there is no pen in his
hand.
“Why isn't it working?” he demands, looking all around him for
Tom. “And while we're at it, when will I be able to see you?”
“You don't believe you can do it,” Tom replies, “And I'm right
here. You're just not seeing me.”
