"In many ways, when you're a Nobel peace laureate, you have an obligation to humankind, to society."

"When the missionaries came to Africa they had the Bible and we had the land. They said 'Let us pray.' We closed our eyes. When we opened them we had the Bible and they had the land."

"I am a leader by default, only because nature does not allow a vacuum."

"In my country of South Africa, we struggled for years against the evil system of apartheid that divided human beings, children of the same God, by racial classification and then denied many of them fundamental human rights."

"I saw as a teacher how, if you take that spark of learning that those children have, and you ignite it, you can take a child from any background to a lifetime of creativity and accomplishment."

"Chronic malnutrition, or the lack of proper nutrition over time directly contributes to three times as many child deaths as food scarcity. Yet surprisingly, you don't really hear about this hidden crisis through the morning news, Twitter or headlines of major newspapers."

"If the relationship of father to son could really be reduced to biology, the whole earth would blaze with the glory of fathers and sons."

"America's a family. We all yell at each other. It all works out."