7nd whosoever speaks a word against the Son of man, it shall be forgiven him: but whosoever speaks against the Holy Spirit, it shall not be forgiven him, neither in this world, nor in the world to come. – Matthew 12:32
(T)o the ungodly, I have this one…word to say. Ever be careful how you speak of the Holy Ghost. I do not know what the unpardonable sin is, and I do not think any man understands it; but it is something like this: “He that speaketh a word against the Holy Ghost, it shall never be forgiven him.” I do not know what that means; but tread carefully! There is danger; there is a pit which our ignorance has covered by sand; tread carefully! you may be in it before the next hour. If there is any strife in your heart to-day, perhaps you will go to the ale-house and forget it. Perhaps there is some voice speaking in your soul, and you will put it away. I do not tell you (that you) will be resisting the Holy Ghost, and committing the unpardonable sin; but it is somewhere there. Be very careful.
O, there is no crime on earth so black as the crime against the Holy Spirit! Ye may blaspheme the Father, and ye shall be damned for it, unless ye repent; ye may blaspheme the Son, and hell shall be your portion, unless ye are forgiven; but blaspheme the Holy Ghost, and thus saith the Lord: “There is no forgiveness, either in this world nor in the world which is to come.” I cannot tell you what it is; I do not profess to understand it; but there it is. It is the danger signal; stop! man, stop! If thou has despised the Holy Spirit- if thou hast laughed at His revelations, and scorned what Christians call His influence, I beseech thee, stop! This morning seriously deliberate. Perhaps some of you have actually committed the unpardonable sin; stop! Let fear stop you; sit down. Do not drive on so rashly as you have done, Jehu! O slacken your reins! Thou who are such a profligate in sin-thou who hast uttered such hard words against the Trinity, stop! Ah! it makes us all stop. It makes us all draw up, and say, “Have I not perhaps so done?” Let us think of this; and let us not at any time stifle either with the words or the acts of God the Holy Ghost. ~ C.H. Spurgeon