Thanks to Bondanella’s book Italian Cinema: From Neorealism To The Present I understand this film. That said it isn’t that great. You have a middle class family who is visited by a stranger who makes love to the whole family. Afterwards the family can perform miracles except for one who goes into catatonic shock.
It’s some sort of a statement on how a middle class family in modern day society would react to an old time Christian saint appearing. The director Pasolini seems to think it would have an overall positive effect.
Sorry Pasolini, I will stick with Marlene Dietrich doing a hot voodoo number in a gorilla suit. I’m watching Blonde Venus as I write this review. If you must see Teorema, approach it with caution.