If you only think about yourself - how much money can I make, what can I buy, how nice is my house, what kind of fancy car do I have? - over the long term, I think, you get bored. I think your life becomes diminished. The way to live a full life is to think: What can I do for others?

Young people: I understand this is important to you, but as you be thinking about climate change, the economy and jobs, war and peace, maybe way at the bottom you should be thinking about marijuana.

In Africa, you often see that the difference between a village where everybody eats and a village where people starve is government. One has a functioning government, and the other does not. Which is why it bothers me when I hear people say that government is the enemy. They don't understand its fundamental role.

If the critics are right that I've made all my decisions based on polls, then I must not be very good at reading them.

Long before being nerdy was cool, there was Leonard Nimoy.

Here in Europe, I think that there are a lot of young people who forget the issues that were at stake during the Cold War.

I would not have the Justice Department prosecuting and raiding medical marijuana users. It's not a good use of our resources.