"We hang on to our values, even if they seem at times tarnished and worn; even if, as a nation and in our own lives, we have betrayed them more often that we care to remember. What else is there to guide us? Those values are our inheritance, what makes us who we are as a people. And although we recognize that they are subject to challenge, can be poked and prodded and debunked and turned inside out by intellectuals and cultural critics, they have proven to be both surprisingly durable and surprisingly constant across classes, and races, and faiths, and generations. We can make claims on their behalf, so long as we understand that our values must be tested against fact and experience, so long as we recall that they demand deeds and not just words."

- barack obama, the audacity of hope