Barack Obama: “It takes courage and sacrifice and resolve over many years.”

I’m going to insist that we can do better than we’re doing right now.

When we choose, when we make that decision, I do believe – and there is evidence for this – that the world gets incrementally better, and that is a worthy goal and it’s worth fighting for.

A drift towards extremism was "not inevitable

And I will fight for that, even if I don’t always think it’s going to win.