Philosophical satisfaction (Score 2, Informative)

Hmmmm ! I don't know about maths or geometry but some of the best kicks I got was from a book called "The Cosmological Argument from Plato to Liebniz" by William Craig Lane. In particular the chapter on Don Scotus' form of the argument was a logical tour de force. Really blew my mind. Of course these arguments are proofs not demonstrations so if you like logical forms with a theological bent check this out its last imprint was 2001.