"Worldliness"

What does it really mean? Is extreme left or extreme right better? Does it make a difference?

I am reading a book right now that is edited by C. J. Mahaney and written by him and some other contributing authors. This book is a book that I would have written had someone asked me to write was on my heart. It touches on the details in our lives that we ALL face day to day and challenges us to consider whether or not we are, or are becoming, worldly.

I'm going to work through this book on this blog and would love feedback to spark some... as Dr. Albert Mohler would call it, intelligent Christian conversation.

To start, what would you say a biblical definition of worldly is? After all, we are not to love the world or anything in the world according to 1st John 2:15, but we also know that God so loved the world that he gave his only Son, that whosoever believeth in Him, will not perish, but will have everlasting life, according to John 3:16.

So what is the proper and biblical view of worldiness? When do we start to become like the world in our attempt to engage it? What's wrong with that anyway? This book addresses these questions and we will be answering them with the clear instruction of Scripture.

Any thoughts to start...?