Too many Americans who struggle with mental health illnesses are suffering in silence rather than seeking help, and we need to see to it that men and women who would never hesitate to go see a doctor if they had a broken arm or came down with the flu, that they have that same attitude when it comes to their mental health.

I think that [having not a lot of time sweating the details] can be both a strength and a weakness. I think it depends on how [Donald Trump] approaches it. If it gives him fresh eyes, then that can be valuable. But it also requires you knowing what you don't know and putting in place people who do have the kinds of experience and background and knowledge that can inform good decision making.

It was young people who stubbornly insisted on justice, stubbornly refused to accept the world as it is that transformed not just the country but transformed the world.

If I'm president, some day, young kids will look at the world differently. They will say, I could be president some day. They couldn't have said that before I came along. The world will see the United States in a different context, as a country of true opportunity for all.

Even when our heart aches, we summon the strength that maybe we didn't even know we had, and we carry on; we finish the race.

The notion that we can control the flow of information is obsolete.

The very technologies that empower us to do great good can also be used to undermine us and inflict great harm.