He made a difference.
Also a few things to think about today:
1. Is there somewhere you see injustice and if so, what are you doing about it?
2. Is there something that you have chosen to remain in ignorance about, and if so what will you do to change that?
3. What is your dream?
4. What do you plan to do to make a difference for others?
5. All speeches give us take away actions, what is your specific take away for today?
Take the time to reflect and make a difference.