Wasting your time is the worst thing you can do to yourself. Wasting your potential is the worst thing you can do to mankind.
There are two kinds of people…One kind, you can tell just by looking at them at what point they congealed into their final selves. It might be a very nice self, but you know you can expect no more surprises from it. Whereas, the other kind keeps moving, changing. With these people, you can never say, “X stops here,” or “Now I know all there is to know about Y.” That doesn’t mean they’re unstable. Ah, no far from it. They are fluid. They keep moving forward and making new trysts with life, and the motion of it keeps them young. In my opinion, they are the only people who are still alive.
Author Gail Godwin in The Finishing School