What metaphors are used in Stranger in a Strange Land by Robert A. Heinlein?

Example of Metaphor:

"Smith is not a man....more a Martian than a man. He's a man by ancestry, a Martian by environment…if you want to drive him crazy and waste that 'treasure trove of scientific information,' call in your fat-headed professors and let them badger him. Don't give him a chance to get well and strong and used to this madhouse planet. Just go ahead and squeeze him like an orange.”