It’s amazing to me that people will make plans for projects or ambitions that span several or even many years, and yet make no accommodation for how the rest of their life will change in that time.
You’re going to get older. You’re going to want different things. The world is going to change. If you don’t acknowledge this, then you’re going to be really, really shocked when you come out on the other side of your five- or ten-year plan.
The Opportunity Machine 