Charles Ellicott Commentary John 9:5

"When I am in the world, I am the light of the world." — John 9:5 (ASV)

As long as I am in the world, I am the light of the world.—Better, when I am in the world. The thought is that the two things necessarily coexist. He is the true Light, and this true Light cannot be in the world without shining in its darkness. (Compare Note on John 1:5.) The thought is here closely connected with His teaching in the Temple but a short time before (John 8:12, I am the Light of the world), and also with the removal of physical and spiritual darkness which immediately followed.