Why Digory Rang The Bell In The Magician's Nephew?

What would you do if you peered into a mysterious room, found a small golden bell hanging from an arch with a tiny hammer sitting beside it? In The Magician’s Nephew, Digory was faced with this very decision. Digory should have rung the bell for three main reasons: Digory excitedly wanted to know what would happened if he rang the bell, ultimately learned life lessons by ringing the bell, and happily healed his mother.
The first reason Digory should have rung the bell is he excitedly wanted to know what would happen if he rang it. Because he was so curious, his actions awoke Jadis and she followed him into the wood between worlds. As a result of the trouble Jadis caused, Digory jumped into a different portal, which led to a blank world.