"It's time to fundamentally change the way that we do business in Washington. To help build a new foundation for the 21st century, we need to reform our government so that it is more efficient, more transparent, and more creative. That will demand new thinking and a new sense of responsibility for every dollar that is spent."

"When you master your attention, you master your entire perception of reality. Let this simple maxim guide your daily deeds."

"Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek."

"I'm no longer just a candidate. I'm the President. I know what it means to send young Americans into battle, for I have held in my arms the mothers and fathers of those who didn't return. I've shared the pain of families who've lost their homes, and the frustration of workers who've lost their jobs."

"I abhor war and view it as the greatest scourge of mankind."

"He who seeks peace must remember that the light of knowledge dispels the darkness of ignorance."

"I am at peace with God. My conflict is with Man."

"War should be the only study of a prince. He should consider peace only as a breathing-time, which gives him leisure to contrive, and furnishes as ability to execute, military plans."