Learn to measure people by the narrowness or breadth of their vision; avoid entangling yourself with those who cannot see the consequences of their actions, who are in a continual reactive mode. They will infect you with this energy. Your eyes must be on the larger trends that govern events, on that which is not immediately visible. Never lose sight of your long-term goals. With an elevated perspective, you will have the patience and clarity to reach almost any objective.
-Robert Greene, The Laws of Human Nature