You don’t change people by attacking their attitude. You make that attempt by primarily influencing their mindset, how they see things and how they interpret what they see and think.
Only then can their response to situations (attitude) change.
As you pursue your visionary goals, there are many variations of your attitude that you may need to alter, they may not outrightly be negative attitudes but they may not be well suitable for the path of leadership you seek to take.
Leading yourself to more noble heights of excellence and success as well as leading others requires constant change, improvement and an attitude check. For in all instances, attitude will always determine outcomes.