We can almost recycle everything now. If we lived within our means, by being prudent, the 7 billion people in the world could have everything they needed. Global politics should be moving in that direction. But we think as people and countries, not as a species.

In life you can fall down 1000 times but the point is to have the willingness to stand up and to start again.

I may appear to be an eccentric old man... But this is a free choice.

What's sad is that an 80-year-old grandpa has to be the open-minded one. Old people aren't old because of their age, but because of what's in their heads. They are horrified at this, but they aren't horrified at what's happening in the streets?

But we think as people and countries, not as a species.

No country can solve climate change alone, we have to take global measures.

This is a matter of freedom. If you don't have many possessions then you don't need to work all your life like a slave to sustain them, and therefore you have more time for yourself.