[he doesn't expect her to climb out of the tub--and then he doesn't expect her to be clothed by light itself. sorcery. so he's able to hide his surprise rather well, and narrow his eyes at her.]

Very impressive. But your words still mean nothing.

There were no sorcerers left in the kingdom of Camelot, and any that remained did not dare to practice magic--and we were better for it. Its taint has come upon us, and the kingdom has been seized, and a sorceress-- [he nearly snarls that; Morgana, the sting is still there when he thinks her name, and her betrayal--] --seeks to overthrow the peace that my father has built under his rule.

So, yes. I truly believe in the evils of magic.