Our society is turning toward more and more needless consumption. It is a vicious circle that I compare to cancer . . . . Should we eliminate suffering, diseases? The idea is beautiful, but perhaps not a benefit for the long term. We should not allow our dread of diseases to endanger the future of our species. . . . In order to stabilize world population, we need to eliminate 350,000 people a day. It is a horrible thing to say, but it's just as bad not to say it.

What is a scientist after all? It is a curious man looking through a keyhole, the keyhole of nature, trying to know what's going on.

We are living in an interminable succession of absurdities imposed by the myopic logic of short-term thinking.

Overconsumption and overpopulation underlie every environmental problem we face today

The idea of a group of elders is that, in past civilizations, they have linked worlds; the other world was also present in this one. There is also the argument that elders have "experience." The problem is that experience teaches fear of change. Experience kills imagination. Experience makes people conservative. What we are facing tomorrow requires the force of imagination, not wisdom from yesterday.

We have to prepare for what life could become in 40 years. We need to outline what is possible and what is impossible with the non-renewable resources of the Earth. What role will technological improvement play? Taking all this into account, what kind of life can we produce in the best way for 10 billion people? That's a problem that needs to be solved.

The reason I love the sea I cannot explain - it's physical. When you dive you begin to feel like an angel. It's a liberation of your weight.