When Galileo discovered he could use the tools of mathematics and mechanics to understand the motion of celestial bodies, he felt, in the words of one imminent researcher, that he had learned the language in which God recreated the universe. Today we are learning the language in which God created life. We are gaining ever more awe for the complexity, the beauty, the wonder of God's most devine and sacred gift.

I've been talking about income inequality in America for twenty years, and when I was president, people didn't pay much attention to it, probably because wages were going up. But I don't think I've given a single solitary speech since I left office that I hadn't talked about it. It's a problem around the world and within the United States. So these people have put that on the agenda.

Simply put, unsustainable debt is helping to keep too many poor countries and poor people in poverty.

The arts have long been an integral and vibrant part of our nation's cultural heritage. In its many forms, art enables us to gain a deeper understanding of ourselves and of our society. Providing us with a unique way to learn about people of other cultures, it allows us to discover all that we have in common. At its best, art can beautify our cities, encourage economic development and social change, and profoundly affect the ways we live our lives.

We should, all of us, be filled with gratitude and humility for our present progress and prosperity. We should be filled with awe and joy at what lies over the horizon. And we should be filled with absolute determination to make the most of it.

Torture must only be hypothetical exception, not US policy.

Leadership means bringing people together in pursuit of a common cause, developing a plan to achieve it, and staying with it until the goal is achieved.