Climate change was a point of division between Obama and Republican rival Mitt Romney. The president declared climate change a global threat acknowledged that the actions of humanity were deepening the crisis and pledged to do something about it if elected.

I like to change characters and then slowly I believe the audience treat me as like an actor who can fight. It's not like an action star.

When people align around shared political social economic or environmental values and take collective action thinking and behavior that compromises the lives of millions of people around the world can truly change.

Reconciliation requires changes of heart and spirit as well as social and economic change. It requires symbolic as well as practical action.

Yet what you need is not marches demonstrations rallies or wide associations all of them are important. What you need is direct action. The sooner people understand that the sooner we'll begin to change things.

No real social change has ever been brought about without a revolution... revolution is but thought carried into action.

I get satisfaction out of seeing stuff that makes real change in the real world. We need a lot more of that and a lot less abstract stuff.

Vision without action is merely a dream. Action without vision just passes the time. Vision with action can change the world.

Excess generally causes reaction and produces a change in the opposite direction whether it be in the seasons or in individuals or in governments.

We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction.