1 John 2:15-17

"Love not the world, neither the things that are in the world. 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. And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever."

Dopamine is the drug of choice for those that are of the world.  See the issue All that is of the world for an explanation.

"And what concord [harmony or agreement] hath Christ with Belial?"  2 Corinthians 6:15.  "No man can serve two masters:  for either he will hate the one, and love the other. . .Ye cannot serve God and mammon."  Matthew 6:24