John 8:12

The rest of the chapter is taken up with debates between Christ and contradicting sinners, who cavilled at the most gracious words that proceeded out of his mouth. It is not certain whether these disputes were the same day that the adulteress was discharged; it is probable they were, for the evangelist mentions no other day, and takes notice (Joh 8:2) how early Christ began that day's work. Though those Pharisees that accused the woman had absconded, yet there were other Pharisees (Joh 8:13) to confront Christ, who had brass enough in their foreheads to keep them in countenance, though some of their party were put to such a shameful retreat; nay perhaps that made them the more industrious to pick quarrels with him, to retrieve, if possible, the reputation of their baffled party. In these verses we have, I. A great doctrine laid down, with the application of it. 1. The doctrine is, That Christ is the light of the world (Joh 8:12): Then spoke Jesus again unto them; though he had spoken a great deal to them to little purpose, and what he had said was opposed, yet he spoke again, for he speaketh once, yea, twice. They had turned a deaf ear to what he said, and yet he spoke again to them, saying, I am the light of the world. Note, Jesus Christ is the light of the world.

— Matthew Henry's Concise Commentary (public domain)

FURTHER DISCOURSES OF JESUS--ATTEMPT TO STONE HIM. (John 8:12-59) I am the light of the world--As the former references to water (Joh 4:13-14; Joh 7:37-39) and to bread (Joh 6:35) were occasioned by outward occurrences, so this one to light. In "the treasury" where it was spoken (see on Joh 8:20) stood two colossal golden lamp-stands, on which hung a multitude of lamps, lighted after the evening sacrifice (probably every evening during the feast of tabernacles), diffusing their brilliancy, it is said, over all the city. Around these the people danced with great rejoicing. Now, as amidst the festivities of the water from Siloam Jesus cried, saying, "If any man thirst, let him come unto me and drink," so now amidst the blaze and the joyousness of this illumination, He proclaims, "I AM THE LIGHT OF THE WORLD"--plainly in the most absolute sense. For though He gives His disciples the same title, they are only "light in the Lord" (Eph 5:8); and though He calls the Baptist "the burning and shining light" (or "lamp" of his day, Joh 5:35), yet "he was not that Light, but was sent to bear witness of that Light: that was THE TRUE LIGHT which, coming into the world, lighteth every man" (Joh 1:8-9). Under this magnificent title Messiah was promised of old (Isa 42:6; Mal 4:2, &c.). he that followeth me--as one does a light going before him, and as the Israelites did the pillar of bright cloud in the wilderness.

— Jamieson-Fausset-Brown Commentary (public domain)