One of his nicknames was that of 'The Light of the World', a name he humbly used of himself.
A name given to illustrate that here was the bringer of light.
Practically the one who enables truth to be seen just as light enables the healthy eye to see
Practically the one who gives life itself, like the nourishment contained in every light wave that hits the Earth.
Some have worshipped the 'Sun' knowing it's power to sustain life.
More have worshipped the 'Son' through whom all things were made, and who will outlast even that star we orbit!