Proof from the soul

Rabbi Shalom,
There is a widely used proof for the existence of God from the existence of the soul. The proof goes like this:
A. Man is a thinking creature.
B. Thinking requires a non-empirical dimension (requires soul).
C. A soul purified by God.
D. There is a God. M.S.L.
The Rabbi did not need it. At first I thought the Rabbi did not believe in the existence of the soul (perhaps following Descartes), but recently I have seen several cases in which you wrote that you do believe in the existence of a soul. Therefore, the question arises why the Rabbi did not need this proof after all, and is there a flaw in it?
The answer a secular friend gave her was that thought is an imperial function of the body that is not distilled into the soul (he believes that humans can be cloned). Is his refutation convincing?
Sorry for the rant.
hand.