Purpose

Simon Sinek discusses the difference between rationalising a decision and finding real purpose:

Providing jobs, driving the economy, serving the shareholder are not purposes. They are rationalizations used when a greater cause or purpose is not clear or not there.  Real purpose has a clear and definitive direction. It is a path that points towards a very specific vision of the future. Rationalizations have no destination, they are simply a calculation to demonstrate some benefit to justify the actions. source