I've always been opposed to population control. In climate terms, population is not the biggest problem going forward.

Climate change is the single biggest thing that humans have ever done on this planet. The one thing that needs to be bigger is our movement to stop it.

The technology we need most badly is the technology of community, the knowledge about how to cooperate to get things done.

Very few people on earth ever get to say: 'I am doing, right now, the most important thing I could possibly be doing.' If you'll join this fight that's what you'll get to say

what you do every day is what forms your mind and precious few of us can or would spend most days outdoors.

In 50 years, no one will care about the fiscal cliff or the Euro crisis. They'll just ask, "So the Arctic melted, and then what did you do?"

Global warming is no longer a philosophical threat, no longer a future threat, no longer a threat at all. It's our reality.

Advent: the time to listen for footsteps - you can't hear footsteps when you're running yourself.

We've been given a warning by science, and a wake-up call by nature; it is up to us now to heed them.

The real negotiation is between humans on the one hand and chemistry and physics on the other. And chemistry and physics, unfortunately, don't bargain.

We can either save the planet from catastrophic warming, or protect fossil fuel CEOs. Not both. Do the math(s)

If you discovered something that made you tighten inside, you had better try to learn more about it.

My loneliness was an important part of my own little universe, not some pathological disease that needs to be gotten [sic] rid of.

A good sense of humor will get you everywhere.

Don't bother to examine a folly-ask yourself only what it accomplishes.

If someone has been escaping reality, I don't expect him to dig my music.

A relationship with God simply cannot grow when money, sins, activities, favorite sports teams, addictions, or commitments are piled up on top of it.

The separation of church and state is necessary partly because if religion is good then the state shouldn't interfere with the religious vision or with the religious prophet.

I'm interested in the innovator and the early adopter.

Your destiny is fulfilled as you invest in the destinies of others.

To do things in a way you want to do them, you will have to acquire the ability to think the way you want to think: this is the first step toward getting rich.