This sounds phony.

http://www.dailymail.co.uk/news/article-4864708/Devil-letter-written-posesse...    Coded letter written by a 17th Century nun while she was 'possessed by the Devil' is finally translated using decryption software discovered on the dark web     * Letter written by Sister Maria Crocifissa della Concezione in 1676     * She said it was a message from the devil, but it could not be translated     * Thanks to a decryption software on the dark web, it is now been decoded     * It claims 'God was invented by man', calling him and Jesus 'dead weights'