It's sometimes easier to reject strong evidence than to admit that we've been wrong, this is information about ourselves worth having.

Who are we, if not measured by our impact on others?

But I try not to think with my gut. If I'm serious about understanding the world, thinking with anything besides my brain, as tempting as that might be, is likely to get me into trouble.

We are like butterflies who flutter for a day and think it is forever.

If you look at Earth from space you see a dot, that's here. That's home. That's us. It underscores the responsibility to deal more kindly and compassionately with one another and to preserve and cherish that pale blue dot, the only home we've ever known.

The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.

Man is a transitional animal. He is not the climax of creation