John Bunyan’s Struggle With Satan’s Blasphemy

Satan has a habit of attacking us wherever we are. He whispered blasphemies in Bunyan's mind, and caused him great distress. Just stay fast to God, as that's one of the Devil's vilest tricks, to try and push you away from the LORD. Is to make you feel like you have committed the unpardonable sin, or blasphemed, and He will try to do this, in order to cause a rift between you and God. Do not fall for it, or fall into the temptation.

https://www.ocduk.org/ocd/history-of-ocd/john-bunyan/#:~:text=Yea%2C%20then%20was%20I%20most,strangely%20snatched%20away%2C%20and%20possessed