He told students it was time for them to learn what it means to be a human being on Earth at a time when every living system was failing.

VOA: special.2009.06.05

"Every time Americans debate the problem of states' rights, the relationship of federal power to state power -- which we are indeed having a roiling debate again -- and every time we debate not only race relations, but the very idea of what it means to be an American, multi-racial,greatly diverse society, we are debating the direct legacies of the Civil War."

VOA: special.2011.04.09

But that also means that we cannot blame the United States for every problem that arises in the hemisphere,".

VOA: standard.2009.04.17