Each path to knowledge involves different rules and these rules are not interchangeable.

We're going to have to invest in the American people again, in tax cuts for the middle class, in health care for all Americans, and college for every young person who wants to go. In businesses that can create the new energy economy of the future. In policies that will lift wages and will grow our middle class. These are the policies I have fought for my entire career.

Today, women make up about half our workforce. But they still make 77 cents for every dollar a man earns. That is wrong, and in 2014, it’s an embarrassment. Women deserve equal pay for equal work.

The path towards sustainable energy sources will be long and sometimes difficult. But America cannot resist this transition, we must lead it.

One of the things I've learned about being president is that we'll work on issues for long periods of time, sometimes in obscurity.

It was into my father's image, the black man, son of Africa, that I'd packed all the attributes I sought in myself, the attributes of Martin and Malcolm, DuBois and Mandela.

What is the empathy deficit? The inability of people to stand in other folks shoes. It's hard to empathize with people who have different values than you