We have to do our best to uphold in our own lives the values that they were prepared to die for. We have to honor those who carry forward that legacy… - Barack Obama

I have to also say that Africa’s democratic progress is also at risk when leaders refuse to step aside when their terms end. […] When a leader tries to change the rules in the middle of the game just to stay in office, it risks instability and strife -- as we’ve seen in Burundi. And this is often just a first step down a perilous path. And sometimes you’ll hear leaders say, well, I'm the only person who can hold this nation together. If that's true, then that leader has failed to truly build their nation. […] Nobody should be president for life. And your country is better off if you have new blood and new ideas. I'm still a pretty young man, but I know that somebody with new energy and new insights will be good for my country. It will be good for yours, too, in some cases.

No, the reward comes in knowing that our entire way of life in America depends on the rule of law; that the maintenance of that law is a hard and daily labor; that in this country, we don’t have soldiers in the streets or militias setting the rules. Instead, we have public servants -- police officers -- like the men who were taken away from us.

The wall belongs to history. But we have history to make as well. And the heroes that came before us now call to us to live up to those highest ideals -- to care for the young people who can't find a job in our own countries, and the girls who aren't allowed to go to school overseas; to be vigilant in safeguarding our own freedoms, but also to extend a hand to those who are reaching for freedom abroad. This is the lesson of the ages. This is the spirit of Berlin. And the greatest tribute that we can pay to those who came before us is by carrying on their work to pursue peace and justice not only in our countries but for all mankind.