He that believeth on the Son hath everlasting life… – John 3:36

“I should believe it,” says one, “if Jesus Christ spoke to me, and said so.” My dear friend, He has said it in His Word. Is that Word a lie, or is it true? If it is true, then what more do you want? Christ has written it in His Word; and I like a thing that is written even better than that which is spoken. You know how a man says, when he wants a guarantee about a bargain, “Give it to me in writing; for some people will swear that they never said what we ourselves heard them say, so give it me in black and white.” Well, here it is in black and white: “He that believeth on the Son hath everlasting life;” and again, “There is therefore now”-“now,” mark,-“no condemnation to them which are in Christ Jesus;” and yet again, “Therefore being justified by faith, we have peace with God through our Lord Jesus Christ.”

If all the men in the world were to come, one after another, after I had read something in the Bible, and were all to say, in their different languages, “That is a lie,” I should not believe it an atom the less; and suppose they were all to stand up, and say, “It is true,” I should reply, “Of course it is, but I do not need your word to confirm what Christ has said.” I am perfectly satisfied if He has said it; and there it stands, and all the powers of hell cannot prevail to overthrow it. Here is the solid rock for a soul to rest upon. Christ says, at this moment, to everyone who believes in Him, and trusts in His blood and righteousness, “Thy faith hath saved thee; go in peace.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2770.cfm