Boss versus Leader
"You! Do it!"
"Come, we do it together."
The main objective of leader is not for own or personal gain, but for the organization aim and objectives.
Those who have put their own personal or conflict of interest will be very bad leader. Anything will be at own personal gain, not organization objective.
Keep remember of Manager meaning, we will be a good leader.
Principle Management said
Someone who works with and through other people by coordinating their work activities in order to accomplish organizational goals.
It is not about personal achievement, it is about helping others do their work and achievement.