Not only do people reject Christ Jesus intellectually, but they also reject Him experientially. They experience the fact of His existence but they foolishly reject Him because of their love for the things of this world. The word world in this sense comes from the Greek word cosmos from which we get the word cosmetics. If any man love the world, the love of the Father is not in him. For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world.
Condemnation is based upon a comparison and upon a contrast.
The purpose of light is to dispel darkness. The Lord Jesus Christ came with His primary mission of bringing the Light into this sin darkened world. Never in history has their been spiritual and moral darkness as there is today. Dare to pick up a paper or turn on the news broadcast without seeing or hearing of some wicked and obscene activity taking place. Sexual perversion, lying, stealing, vulgarity, nudity, and violence all further darken this world today.