Do what you say. The saying, lead by example, are the actions of a leader. Think of someone you have personally known who you thought was a good leader, but it turned out they were not. They were saying all the right things and you probably believed them, but their actions did not reflect what they were saying. These are the actions of a leader who have their own agendas and do not possess the courage to do what is right for their people.
Leaders never give up on something, once they have chosen their dream. Many leaders have failed countless times, that is how they have learned. If you try to avoid failure, you will also be avoiding action. The ability to persevere and never give up is how you become a leader.
Integrity, lead by example and perseverance these are the qualities of a great leader. The greatest leaders are also compassionate towards others, but are not easily influenced. I will now leave you with a quote that shows the power that a single leader can produce. "I am not afraid of an army of lions led by a sheep; I am afraid of an army of sheep led by a lion"... Alexander the great