We live in a time of extraordinary change, change that's reshaping the way we live, the way we work, our planet, our place in the world. It's change that promises amazing medical breakthroughs, but also economic disruptions that strain working families. It promises this education for girls in the most remote villages, but also connects terrorists plotting an ocean away. It's change that can broaden opportunity or widen inequality. And whether we like it or not, the pace of this change will only accelerate. America has been through big changes before: wars and depression, the influx of new immigrants, workers fighting for a fair deal, movements to expand civil rights. Each time, there have been those who told us to fear the future; who claimed we could slam the brakes on change; who promised to restore past glory if we just got some group or idea that was threatening America under control. And each time, we overcame those fears. We did not, in the words of Lincoln, adhere to the "dogmas of the quiet past." Instead, we thought anew and acted anew. We made change work for us, always extending America's promise outward, to the next frontier, to more people. And because we did, because we saw opportunity with a--where others saw peril, we emerged stronger and better than before. What was true then can be true now. Our unique strengths as a nation-- our optimism and work ethic, our spirit of discovery, our diversity, our commitment to rule of law--these things give us everything we need to ensure prosperity and security for generations to come. In fact, it's in that spirit that we have made progress these past 7 years. That's how we recovered from the worst economic crisis in generations. That's how we reformed our health care system and reinvented our energy sector. That's how we delivered more care and benefits to our troops coming home and our veterans. That's how we secured the freedom in every State to marry the person we love. But such progress is not inevitable. It's the result of choices we make together. And we face such choices right now. Will we respond to the changes of our time with fear, turning inward as a nation, turning against each other as a people? Or will we face the future with confidence in who we are, in what we stand for, in the incredible things that we can do together? So let's talk about the future and four big questions that I believe we as a country have to answer, regardless of who the next President is or who controls the next Congress. First, how do we give everyone a fair shot at opportunity and security in this new economy? Second, how do we make technology work for us and not against us, especially when it comes to solving urgent challenges like climate change? Third, how do we keep America safe and lead the world without becoming its policeman? And finally, how can we make our politics reflect what's best in us and not what's worst?