Imagine being served a plate of sushi. But this plate also holds all of the animals that were killed for your serving of sushi. The plate might have to be five feet across.

I often think about how my sons will come to know about September 11th. Something overheard? A newspaper image? In school? I would prefer that they learn about it from my wife and me, in a deliberate and safe way. But it's hard to imagine ever feeling ready to broach the subject without some impetus.

It's so beautiful at this hour. The sun is low, the shadows are long, the air is cold and clean. You won't be awake for another five hours, but I can't help feeling that we're sharing this clear and beautiful morning.

I thought, it's a shame that we have to live, but it's a tragedy that we get to live only one life, because if I'd had two lives, I would have spent one of them with her.

I felt, that night, on that stage, under that skull, incredibly close to everything in the universe, but also extremely alone. I wondered, for the first time in my life, if life was worth all the work it took to live. What exactly made it worth it? What's so horrible about being dead forever, and not feeling anything, and not even dreaming? What's so great about feeling and dreaming?

Perhaps in the back of our minds we already understand, without all the science I've discussed, that something terribly wrong is happening. Our sustenance now comes from misery. We know that if someone offers to show us a film on how our meat is produced, it will be a horror film. We perhaps know more than we care to admit, keeping it down in the dark places of our memory-- disavowed. When we eat factory-farmed meat we live, literally, on tortured flesh. Increasingly, that tortured flesh is becoming our own.

One of the greatest opportunities to live our values-or betray them-lies in the food we put on our plates.