John 1:5

shineth in darkness, &c.--in this dark, fallen world, or in mankind "sitting in darkness and the shadow of death," with no ability to find the way either of truth or of holiness. In this thick darkness, and consequent intellectual and moral obliquity, "the light of the Word" shineth--by all the rays whether of natural or revealed teaching which men (apart from the Incarnation of the Word) are favored with. the darkness comprehended it not--did not take it in, a brief summary of the effect of all the strivings of this unincarnate Word throughout this wide world from the beginning, and a hint of the necessity of His putting on flesh, if any recovery of men was to be effected (Co1 1:21).

The scope and design of this chapter is to confirm our faith in Christ as the eternal Son of God, and the true Messiah and Saviour of the world, that we may be brought to receive him, and rely upon him, as our Prophet, Priest, and King, and to give up ourselves to be ruled, and taught, and saved by him. In order to this, we have here, I. An account given of him by the inspired penman himself, fairly laying down, in the beginning, what he designed his whole book should be the proof of (Joh 1:1-5); and again (Joh 1:10-14); and again, (Joh 1:16-18). II. The testimony of John Baptist concerning him (Joh 1:6-9, and Joh 1:15); but most fully and particularly (v. 19-37). III. His own manifestation of himself to Andrew and Peter (Joh 1:38-42), to Philip and Nathanael (Joh 1:43-51).

1:5 the darkness can never extinguish it: Or the darkness has not understood it; literally the darkness cannot grasp it. The Greek word katalambanō (“grasp”) can mean either “understand” or “be hostile”; in John’s Gospel, it means hostility. The darkness would try to destroy Jesus (the light), but it would fail. The light would successfully bring salvation to the world.