[James 4:3-5] pictures the church as the wife of God. God has made us for Himself and has given Himself to us for our enjoyment. Therefore it is adultery when we try to be “friends” with the world. If we seek from the world the pleasures we should seek in God, we are unfaithful to our marriage vows. And, what’s worse, when we go to our Heavenly Husband and actually pray for the resources with which to commit adultery with the world, it is a very wicked thing. It is as though we should ask our husband for money to hire male prostitutes to provide the pleasure we don’t find in Him!
John Piper