Sometimes, I, anyway, get tired of playing defence, and like to play offence.

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)

No one can call themselves a writer until he or she has written at least fifty stories.

Coming up with ideas is the easiest thing on earth. Putting them down is the hardest.

Designs in connection with postage stamps and coinage may be described, I think, as the silent ambassadors on national taste.

I've always looked for the perfect life to step into. I've taken all the paths to get where I wanted. But no matter where I go, I still come home.

Monsters just outside our peripheral vision are scarier to contemplate than monsters miles away or in someplace only a fool would set foot in.

Neither prosperity nor empire nor heaven can be worth winning at the price of a virulent temper, bloody hands, an anguished spirit, and a vain hatred of the rest of the world.

An egotist always resents meeting another egotist as if he alone had the right to be one.

If you live in a society that wishes you didn't exist, anything you do to make yourself happy disrupts its attempts to wipe you out, or at the very least, make you invisible.

Give way to your opponent; thus will you gain the crown of victory.

To live without the creative potential of our own destructiveness is to be a cardboard angel.