I’m very aware of what you’re talking about as I was involved with the radio in Africa in the same period as I was doing Concrete – I was doing both at the same time.

I do not want to heap coals of fire on anyone’s head, but I would like to advise those who keep the living thought of the dead hidden away in cardboard boxes, to pass on as quickly as possibly such explosive material, whose only legitimate heir is the whole world, that is to say, my neighbor.

First, it doesn’t surprise me that traditional music has experienced a kind of exhaustion in the 20th century – not forgetting that many musicians started to look outside the traditional structures of tonality.

It’s ridiculous that time and time again we need a radioactive cloud coming out of a nuclear power-station to remind us that atomic energy is extraordinarily dangerous.

The world changes materially. Science makes advances in technology and understanding. But the world of humanity doesn’t change.

Sound is the vocabulary of nature.

Sound is the vocabulary of nature... noises are as well articulated as the words in a dictionary... Opposing the world of sound is the world of music.

People who try to create a musical revolution do not have a chance, but those who turn their back to music can sometimes find it.

I was horrified by modern 12-tone music. I said to myself, 'Maybe I can find something different... maybe salvation, liberation, is possible.

I do not want to heap coals of fire on anyone's head, but I would like to advise those who keep the living thought of the dead hidden away in cardboard boxes, to pass on as quickly as possibly such explosive material, whose only legitimate heir is the whole world, that is to say, my neighbor.