I never thought of political endeavors primarily in terms of power and prestige, and I never thought of economic endeavors primarily in terms of wealth and position.

I experimented with marijuana a time or two.

Without question, bicycling is an efficient, economical and environmentally sound form of transportation and recreation. Bicycling is a great activity for families, recreational riders and commuters. Hillary, Chelsea and I have bicycles.

First, I worry about climate change. It's the only thing that I believe has the power to fundamentally end the march of civilization as we know it, and make a lot of the other efforts that we're making irrelevant and impossible.

The only preparation for prospering in the global economy is investing in ourselves.

Presidents are not permitted to have personal feelings.

Our generation, like the one before us, must choose. Without the threat of the Cold War, without the pain of economic ruin, without the fresh memory of World War II's slaughter, it is tempting to pursue our private agendas -- to simply sit back and let history unfold. We must resist the temptation.