Who tells them this.... ?

There's no such thing as Magic

                                               There isn't? What's this <points> ?

They're 'Tricks'

                                                Tricks aren't Magic?

No, there's no such thing as Magic

                                                But there are tricks?

Yes

                                               What about miracles?

They don't exist

                                              There's no miracles <looks at infants>

None at all

                                              What's this?

That's just a baby

                                              Just a baby?

Yes it is

                                               Oh