We the people. Manifest Destiny. Conceived in liberty. Fear itself. Ask not. Morning in America. United we stand. Yes we can. In times of great change and tumult presidents seek to inspire beleaguered Americans by reminding them of their national identity.

Obama won the presidency on the strength of his message and the skills of the messenger. Now the talk of hope and change feels out of tune when so many Americans are out of work over-mortgaged and worried that life will be even tougher for their children.

Close elections tend to break toward the challenger because undecided voters - having held out so long against the incumbent - are by nature looking for change.

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.

We're living in an era of unprecedented change and I want to be a part of documenting it.

The notion that Congress can change the meaning given a constitutional provision by the Court is subversive of the function of judicial review and it is not the less so because the Court promises to allow it only when the Constitution is moved to the left.

In science the important thing is to modify and change one's ideas as science advances.

The more specific idea of Evolution now reached is - a change from an indefinite incoherent homogeneity to a definite coherent heterogeneity accompanying the dissipation of motion and integration of matter.

Unless it's a specific accent or something about physicality you have to change I am generally not such a conscious actor.

If the shoe doesn't fit must we change the foot?