Fear is the most powerful enemy of reason.

In the end, we must restore a balance within ourselves between who we are and what we are doing. Each of us must take a greater personal responsibility for this deteriorating global environment; each of us must take a hard look at the habits of mind and action that reflect - and have led to - this grave crisis.

We have to abandon the conceit that isolated personal actions are going to solve this crisis. Our policies have to shift.

Our planet has a rising fever. If the crib catches fire you don't say: 'Hmmm, how fast is that crib going to burn? Has it ever burned before? Is my baby flame retardant?'

Remember America, I gave you the Internet and I can take it away.

I think the fact that within the bitcoin universe an algorithm replaces the functions of the government is actually pretty cool. I am a big fan of bitcoin.

I have felt for a long time that the pathway to solving the climate crisis is through the building of a massive grassroots army of men and women who will go out there and win the conversation on climate, and persuade businesses, and universities, and towns to switch to renewable energy and to reduce emissions. And the big change from ten years ago is that people are way more receptive, not only to the message that we have to act, not only to the message that now we can act, we have the solutions now - that's the biggest change - but also willing to make a commitment that we will act.