God and physics
In C. S. Lewis' "Voyage of the Dawn Treader," Lucy reads a spell from a book to make invisible things visible. From behind her, Aslan the Lion appears.
"Oh, Aslan," said she, "it was kind of you to come."
"I have been here all the time," said he, "but you have just made me visible."
"Aslan!" said Lucy almost a little reproachfully. "Don't make fun of me. As if anything I could do would make you visiblel"
"It did," said Aslan. "Do you think I wouldn't obey my own rules?"