I did a lot of work on energy efficiency at the White House. By the time I left we had taken the equivalent of six hundred cars a year off the road in reduced greenhouse gas emissions just in the White House complex.

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.

Everybody knows that I have tougher ethics rules than any previous President.

Our overriding environmental challenge tonight is the worldwide problem of climate change, global warming, the gathering crisis that requires worldwide action.

I made a big mistake. It is indefensible and I am sorry.

To the extent that our workers compete with low-paid Mexicans, it is as much through undocumented immigration as trade. This pattern threatens low-paid, low-skill U.S. workers. The combination of domestic reforms and NAFTA-related growth in Mexico will keep more Mexicans at home. It is likely that a reduction in immigration will increase the real wages of low-skilled urban and rural workers in the United States.

Together, people with good hearts and fine minds can move the world.