„He who has stopped getting better has stopped being good.“

„The ability to lead others does not come from power or prestige, but from self-awareness.“

„Leadership quality is not a question of wealth or status. It is a question of harmony.“

„We are what we repeatedly do. Excellence then is not an act, it is a question of training.“

„If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will fail in every battle.“