“Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.”
John 8:12 — Greek Interlinear
Church Fathers on John 8:12
Having absolved the woman from her Sill, lest some should doubt, seeing that He was really man, His power to forgive sins, He deigns to give further disclosure of His divine nature; Then spoke Jesus again to them, saying, I am. the Light of the world.
Where it is to be observed, He does not say, I am the light of Angels, or of heaven, but the Light of the world, i.e. of mankind who live in darkness, as we read, To give light to them that sit in darkness, and in the shadow of death.
As they had brought Galilee as an objection against Him, and doubted His being one of the Prophets, as if that was all He claimed to be, Me wished to show that He was not one of the Prophets, but the Lord of the whole earth: Then spoke Jesus again to them, saying, I am the Light of the world: not of Galilee, or of Palestine, or of Judea.