They no longer believed that God made the beautiful music. They believed that the wires did. He always knew what he was talking about. Wires don't make the music. Piano hammers do.
Piano hammers are the secret.
When they dance on the wires, they make the music. And that's what they did. They no longer believed that the wires made the music. They believed that the piano hammers did. Then one day, Father Mouse came back from exploring the piano.