How Do You Become a Great Leader?

My son, Kaden, and I have been in Tae Kwon Do for over a year now. We just received our brown belt today. It's been a positive journey for us. It is a great opportunity for Kaden and I to spend quality time together while staying fit and learning martial arts. Not only have we been learning martial arts, but the instructor reinforces character and leadership principles. Here are some questions from Kaden's Brown Belt curriculum:
1. What is a leader? Someone who guides others towards a goal.
2. How do you become a great leader? Put others first, respect others, and have courage for what is right.
3. What does courage mean? To not give up even if something is difficult or uncomfortable.
I love the simplicity and profoundness of the answers. I've struggled with putting others first as my leadership influence has increased at work and church. It's easy for leadership confidence to turn into condescending leadership.