"Having large piles of things, like books, makes it too easy to slip into a rut and stay in the same place doing the same thing out of mere inertia (more mass==

"Having large piles of things, like books, makes it too easy to slip into a rut and stay in the same place doing the same thing out of mere inertia (more mass==more inertia, and books en masse are heavy)." This is excellent insight and something most people don't consider until they have to move for the first time after a few years in the real world and suddenly their possessions which used to fit in the back of a SUV in their college days now require a small truck to move. The problem is also compounded if you are the kind of person that feels bad about throwing away perfectly good books etc... out.