The Desire Of Eyedols

"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. And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever."

John was saying that the idolater is unable to bear Fruit and confirm him/herself as Her/His pupil. Then they die without having ever served and satisfied anybody, not even themselves.