 I Sent you word in my last, I would not meddle with writing any thing of the Divine Soul of Man, by reason it belongs to Faith and Religion, and not to Natural Philosophy; but since you desire my opinion concerning the Immortality of the Divine Soul, I cannot but answer you plainly, that first I did wonder much you made me question of that, whose truth, in my opinion, is so clear, as hardly any rational man will make a doubt of it; for I think there is almost no Christian in the world, but believes the Immortality of the Soul, no not Christians onely, but Mahometans and Jews: But I left to wonder at you, when I saw Wise and Learned Men, and great Divines, take so much pains as to write whole Volumes, and bring so many arguments to prove the Immortality of the Soul, for this was a greater Miracle to me, then if Nature had shewed me some of her secret and hidden effects, or if I had seen an Immaterial Spirit. Certainly, Madam, it seems as strange to me to prove the Immortality of the Soul, as to convert Atheists; for it is impossible, almost, that any Atheist should be found in the World: For what Man would be so senceless as to deny a God? Wherefore to prove either a God, or the Immortality of the Soul, is to make a man doubt of either: for as Physicians and Surgeons apply strengthening Medicines onely to those parts of the body which they suppose the weakest, so it is with proofs and arguments, those being for the most part used in such subjects, the truth of which is most questionable. (Cavendish 1664, 220)