Charles Spurgeon Commentary 1 John 5:10

"He that believeth on the Son of God hath the witness in him: he that believeth not God hath made him a liar; because he hath not believed in the witness that God hath borne concerning his Son." — 1 John 5:10 (ASV)

Because he does not believe God, he has made Him a liar;

He need not actually say that God is a liar; the fact that he does not believe Him has, in effect, made God a liar. To how many of us does this passage apply? He who does not believe God has made Him a liar;

Because he believeth not the record that God gave of his Son.

Is this true concerning anyone here! If so, perhaps you have not been aware of the extent of your guilt. You have remained unbelievers out of sheer carelessness, out of neglect of the Word.

I urge you, do not rest in such a state of mind and heart now that you are informed by the Spirit of God that, by your unbelief, you are making God a liar. Who would willfully commit that great sin? Let us shudder at the thought of the bare possibility of such guilt as this.