I, even I, am He that blotteth out thy transgressions for Mine own sake, and will not remember thy sins. – Isaiah 43:25

Hast thou ever felt thyself to be acquitted by Christ? “No,” saith one, “I never expected to feel that; I thought that we might know it perhaps when we came to die-that a few eminent Christians might then possibly know themselves to be forgiven; but I think, sir, you are very enthusiastic to ask me whether I have ever felt myself to be forgiven.” My dear friend, you mistake. Do you think, if a man had been a galley-slave, chained to an oar for many a year, if he were once set free he would not know whether he were free or not? Do you think that a slave who had been toiling for years, when once he trod upon the land of freedom, if you should say to him: “Do you know that you are emancipated?” Do you think he would not know it? Or a man that has been dead in his grave, if he were awakened to life, do you think he would not know it? There may be times when he hath forgotten the season; but he will know himself to be alive; he will feel and know himself to be free. Tell me it is enthusiastic to ask you whether you have ever felt your chains broken? Sirs, if you have never felt your chains fall off from you, then be it known that your chains are on you; for when God breaketh our chains from off us, we know ourselves to be free. The most of us, when God did set us free from our prison-house, did leap for very joy; and we remember the mountains and the hills did burst forth before us into singing, and the trees of the field did clap their hands. We shall never forget that gladsome moment; it is impressed upon our memory; we shall remember it till life’s latest hour. I ask thee, again, Didst thou ever feel thyself forgiven? And if thou sayest “No,” then thou hast no right to think thou art. If Jesus hath never whispered in thine ear, “I, even I, am He that blotteth out thy transgressions,” thou hast no right to think thyself pardoned. O! I beseech thee, examine thyself, and know whether thou hast been condemned by the law, and whether thou hast been acquitted by Christ!~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3254.cfm