John Bunyan (1628-1688) was a preacher and spiritual writer who is best known for writing Pilgrim's Progress. Bunyan also wrote a spiritual autobiography, Grace Abounding to the Chief of Sinners, in which he describes his struggle with obsessive blasphemous thoughts.
96. For about the space of a month after, a very great storm came down upon me, which handled me twenty times worse than all I had met with before; it came stealing upon me, now by one piece, then by another; first, all my comfort was taken from me, then darkness seized upon me, after which whole floods of blasphemies, both against God, Christ, and the Scriptures, were poured upon my spirit, to my great confusion and astonishment. These blasphemous thoughts were such as also stirred up questions in me, against the very being of God, and of His only beloved Son; as whether there were, in truth, a God, or Christ, or no? And whether the holy Scriptures were not rather a fable, and cunning story, than the holy and pure Word of God?...
104. Now I blessed the condition of the dog and toad, and counted the estate of everything that God had made far better than this dreadful state of mine, and such as my companions was; yea, gladly would I have been in the condition of dog or horse, for I knew they had no soul to perish under the everlasting weights of hell for sin, as mine was like to do. Nay, and though I saw this, felt this, and was broken to pieces with it, yet that which added to my sorrow was, that I could not find that with all my soul I did desire deliverance. That scripture did also tear and rend my soul, in the midst of these distractions, 'The wicked are like the troubled sea, when it cannot rest, whose waters cast up mire and dirt. There is no peace, saith my God, to the wicked' (Isa. 57.20, 21)...
106. While this temptation lasted, which was about a year, I could attend upon none of the ordinances of God but with sore and great affliction. Yea, then was I most distressed with blasphemies; if I have been hearing the Word, then uncleanness, blasphemies and despair would hold me as captive there; if I have been reading, then, sometimes, I had sudden thoughts to question all I read; sometimes, again, my mind would be so strangely snatched away, and possessed with other things, that I have neither known, nor regarded, nor remembered so much as the sentence that but now I have read...
135. But it was neither my dislike of the thought, nor yet any desire and endeavour to resist it that in the least did shake or abate the continuation, or force and strength thereof; for it did always, in almost whatever I thought, intermix itself therewith in such sort that I could neither eat my food, stoop for a pin, chop a stick, or cast mine eye to look on this, or that, but still the temptation would come, Sell Christ for this, or sell Christ for that; sell Him, sell Him.
136. Sometimes it would run in my thoughts, not so little as a hundred times together, Sell Him, sell Him, sell Him; against which I may say, for whole hours together, I have been forced to stand as continually leaning and forcing my spirit against it, lest haply, before I were aware, some wicked thought might arise in my heart that might consent thereto; and sometimes also the tempter would make me believe I had consented to it, then should I be as tortured upon a rack for whole days together.
137. This temptation did put me to such scares, lest I should at sometimes, I say, consent thereto, and be overcome therewith, that by the very force of my mind in labouring to gainsay and resist this wickedness, my very body also would be put into action or motion by way of pushing or thrusting with my hands or elbows, still answering as fast as the destroyer said, Sell Him; I will not, I will not, I will not, I will not; no, not for thousands, thousands, thousands of worlds. Thus reckoning lest I should in the midst of these assaults, set too low a value of Him, even until I scarce well knew where I was, or how to be composed again...
139. But to be brief, one morning, as I did lie in my bed, I was, at other times, most fiercely assaulted with this temptation [i.e., sinful thought], to sell and part with Christ; the wicked suggestion still running in my mind, Sell Him, sell Him, sell Him, sell Him, sell Him, as fast as a man could speak; against which also, in my mind, as at other times, I answered, No, no, not for thousands, thousands, thousands, at least twenty times together. But at last, after much striving, even until I was almost out of breath, I felt this thought pass through my heart, Let Him go, if He will! and I thought also, that I felt my heart freely consent thereto. Oh, the diligence of Satan! Oh, the desperateness of man's heart!..
186. Thus, by the strange and unusual assaults of the tempter, was my soul, like a broken vessel, driven as with the winds, and tossed sometimes headlong into despair, sometimes upon the covenant of works, and sometimes to wish that the new covenant, and the conditions thereof, might, so far forth as I thought myself concerned, be turned another way and changed. But in all these I was but as those that jostle against the rocks; more broken, scattered, and rent. Oh, the unthought of imaginations, frights, fears, and terrors that are affected by a thorough application of guilt, yielded to desperation!...This I saw, this I felt, and under this I groaned...