Not everybody can be famous, but everybody can be great, because greatness is determined by service. (Martin Luther King, Jr, late civil rights leader)
This may not be one of Dr. King’s most famous statements, but it certainly is a great criterion to consider. People whose leadership has been most successful have been those who may have reached a noteworthy achievement but who have also accomplished something worthy in service to others. Think of Mother Teresa or Helen Keller, for example.
God has given each of you a gift from his great variety of spiritual gifts. Use them well to serve one another. (1 Peter 4:10)