John 1:3-4 — All things were made by Him; and without Him was not any thing made that was made. In Him was life; and the life was the light of men.
made by Him — this includes the new creation of believers. For by Him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by Him, and for Him (Colossians 1:16).
life — He that hath the Son hath life; and he that hath not the Son of God hath not life (1 John 5:12).
life = life of God (zoe) but also all life as distinct from natural life (psuche)
light — to reveal Christ's identity and expose sin. His life either exposes or illuminates in all cases. Enlightenment is often gradual.
Christ lights all men to make them accountable for their sin. That was the true Light, which lighteth every man that cometh into the world (John 1:9).