When we attend to this world, care for it’s cares, love it, please it and serve it, we become, not simply woefully misguided, but slaves to the world. Lutzer was right when he said: “Worldliness is excluding God from our lives and, therefore, consciously or unconsciously accepting the values of a man-centered society.” And, “Worldliness is not only doing what is forbidden but also wishing it were possible to do it. One of its distinctives is mental slavery to illegitimate pleasure.”
(How In This World To Be Holy, by Edwin Lutzer, 1985).