The Man Who Could Work Miracles

"The subsequent meditations of Mr. Fotheringay were of a severe but confused description. So far, he could see it was a case of pure willing with him. The nature of his experiences so far disinclined him for any further experiments, at least until he had reconsidered them. But he lifted a sheet of paper, and turned a glass of water pink and then green, and he created a snail, which he miraculously annihilated, and got himself a miraculous new tooth-brush."