Riddle: In a small town, a curious boy named Tim found a…

The Riddle

In a small town, a curious boy named Tim found a peculiar book titled 'The Mirror of Time' in the library. Inside, he read about a man who could see the future by simply looking into a mirror. Intrigued, Tim tried it himself, but saw nothing unusual. He realized the key wasn't in the mirror but something else he used to see the future. What did the man actually use to see the future?