The parable of the third stone cutter from Peter Drucker.
A man walks up to a stone cutter on a worksite.
The man asks him: "what are you doing?"
The stone cutter says: "Good day's pay for a good day's work."
The man walks up to the second stone cutter and asks him "What are you doing?"
The second stone cutter says: "I'm going to be the best stone cutter in the world."
The man walks up to the third stone cutter and asks him "What are you doing?"
The third stone cutter says: "I'm building a cathedral."
Teams that are going to change the world need the third stone cutter.