Materialism is in fact no protection. Those who seek it in that hope (they are not a negligible class) will be disappointed. The thing you fear is impossible. Well and good. Can you therefore cease to fear it? Not here and now. And what then? If you must see ghosts, it is better not to disbelieve in them.

A dragon has just flown over the tree-tops and lighted on the beach. Yes, I am afraid it is between us and the ship. And arrows are no use against dragons. And they're not at all afraid of fire." "With your Majesty's leave-" began Reepicheep. "No, Reepicheep," said the King very firmly, "you are not to attempt a single combat with it.

I object to that remark very strongly! - The Magician's Nephew

Spying on people by magic is the same as spying on them in any other way.

Ambition! We must be careful what we mean by it. If it means the desire to get ahead of other people - which is what I think it does mean - then it is bad. If it means simply wanting to do a thing well, then it is good. It isn't wrong for an actor to want to act his part as well as it can possibly be acted, but the wish to have his name in bigger type than the other actors is a bad one.

The Son of God became a man to enable men to become sons of God." ~ Mere Christianity, By C. S. Lewis

I expect you have seen someone put a a lighted match to a bit of newspaper which is propped up in a grate against an unlit fire. And for a second nothing seems to have happened; and then you notice a tiny steak of flame creeping along the edged of the newspaper. It was like that now.