I'm a scientist, not a theologian. I don't know if there is a God or not. Religion requires certainty.

I have heard that the Saudi Arabians are paying Greenpeace to campaign against Nuclear Power. It wouldn't surprise me at all.

NASA will send up a big sun shade that will be in orbit between the earth and sun and deflect 2 or 3 percent of the sunshine back into space. It would be cheaper than the international space station.

Evolution is a tightly coupled dance, with life and the material environment as partners. From the dance emerges the entity Gaia.

There aren't just bad people that commit genocide; we are all capable of it. It's our evolutionary history.

The problem is we don't know what the climate is doing. We thought we knew 20 years ago. That led to some alarmist books - mine included - because it looked clear-cut, but it hasn't happened.

Let's make hay while it lasts.

Perhaps the single most important thing that we can do to undo the harm we have done is to fix firmly in our minds the thought: the earth is alive.

Nature favors those organisms which leave the environment in better shape for their progeny to survive.

I suspect any worries about genetic engineering may be unnecessary. Genetic mutations have always happened naturally, anyway.

The oil companies regard nuclear power as their rival, who will reduce their profits, so they put out a lot of disinformation about nuclear power.

Within us is Energy which when channelized, spirals into Inspiration.

There are two ways of meeting difficulties. You alter the difficulties or you alter yourself to meet them.

Only a bad artist thinks he has a good idea. A good artist does not need anything.

The culture at Valve is pretty much crowdsourced. The handbook is a wiki. One of the first things we say to new hires is, 'You have to change something in the handbook.'

If life is often so hard as this, I don't see how we ever shall get through it.

In real life, comedians aren't funny.

Inasmuch as ill-deeds spring up as a spontaneous crop, they are easy to learn.

Sometimes what seems like surrender isn't surrender at all. It's about what's going on in your own hearts.