One principle to have a fulfilling life is to create focus.
You can create focus by minimizing the number of things you do and then increasing the efficiency of how well you do them.
Too often we do too many things in life and then only scratch the surface.
By not going deep into a few things, we don’t get to the point where we are creating unique value. When you do something very well it becomes a source of fulfillment.
Image what an athlete would be like if they played many different sports instead of focusing on one.
Finding your singular focus is finding your purpose.