8:13 {5} The Pharisees therefore said unto him, {a} Thou bearest record of thyself; thy record is not true.
(5) Christ is without all exception the best witness of the truth, for he was sent by his Father for that purpose, and his Father showed his approval of him to the world by infinite miracles.
(a) You bear witness of yourself, which is worth nothing in the opinion of all men, and for a man to commend himself is very uncommendable.
8:13 Thou testifiest of thyself; thy testimony is not valid - They retort upon our Lord his own words, John 5:31; if I testify of myself, my testimony is not valid. He had then added, There is another who testifieth of me. To the same effect he replies here, John 8:14, Though I testify of myself, yet my testimony is valid; for I am inseparably united to the Father. I know - And from firm and certain knowledge proceeds the most unexceptionable testimony: whence I came, and whither I go - To these two heads may be referred all the doctrine concerning Christ. The former is treated of John 8:16, and c, the latter John 8:21, and c. For I know whence I came - That is, For I came from God, both as God and as man. And I know it, though ye do not.
8:12-16 Christ is the Light of the world. God is light, and Christ is the image of the invisible God. One sun enlightens the whole world; so does one Christ, and there needs no more. What a dark dungeon would the world be without the sun! So would it be without Jesus, by whom light came into the world. Those who follow Christ shall not walk in darkness. They shall not be left without the truths which are necessary to keep them from destroying error, and the directions in the way of duty, necessary to keep them from condemning sin.
