He that believeth on the Son of God hath the testimony — The dear evidence of this, in himself: he that believeth not God, in this, hath made him a liar; because he supposes that to be false which God has expressly testified.
Related Commentaries of 1 John 5:10
1 John 5:10
10 He that believeth on the Son of God hath the witness in himself: he that believeth not God hath made him a liar; because he believeth not the record that God gave of his Son.