Worldliness is a hard word to define, mainly because the world sees their way of thinking as a good thing. Consider what one online dictionary has to say about the matter. “Worldliness is the quality or character of being intellectually sophisticated through cultivation or experience or disillusionment. Thinking and acting like the world is just a way to be more sophisticated.
I think Merriam – Webster define the term more accurately. “Worldliness is relating to, or devoted to this world and its pursuits rather than to religion or spiritual affairs.” In essence, worldliness is being driven more by the pursuits of the world, that by God.