Politically it would be terribly repressive to prevent people from having as many children as they want. But something's got to prevent it; and it won't be pleasant... We're still behaving in ways that have become disastrous... I don't think this helps us to survive... We're very species-centric... and now exist at the expense of every other form of life on Earth.

What you remember saves you.

I also think that life itself is both indifferent to us and the source of all of our joys and everything that we love. And it's necessary to accept the one in order to love the other.

We're losing a species every few seconds. We cannot put them back. If we change our mind and say, 'Oops, we made a mistake' - it's too late. This is the world we live with.

Now all my teachers are dead except silence.

From what we cannot hold the stars are made.

On the last day of the world I would want to plant a tree