If money is, as it is often posited, the root of all evil, then where does that leave greed? Let's do the math: Greed takes up most of your time and most of your money, so therefore greed = time x money. And, as we all know, time = money. Ergo, greed = money x money. So, if money is the square root of all evil, then we are forced to conclude that greed is evil as well, perhaps even more so, in that it forced us to do math.
But when does the desire to simply possess something turn into unchecked greed? That's easy: when the things that you possess start possessing you.
Dale E. Basye and Bob Dob, in Rapacia: The Second Circle of Heck (2009), "Backword", p. 361.