A painting is nothing more than light reflected from the surface of a pigment-covered canvas. But a great painter can make you see the depth, make you feel the underlying emotion, make you sense the larger world. That, too, is the power of science: to sense and convey the depth and dimensionality of nature, to glance at the surface and to divine the shape of the universe around us.

Authorship is not a trade, it is an inspiration; authorship does not keep an office, its habitation is all out under the sky, and everywhere the winds are blowing and the sun is shining and the creatures of God are free.

I like commas. I detest semi-colons - I don't think they belong in a story. And I gave up quotation marks long ago. I found I didn't need them, they were fly-specks on the page.

My own thing is in my head. I hear sounds and if I don't get them together nobody else will.

The great problem was the selection of the readymade. I needed to choose an object without it impressing me: that is to say, without it providing any sort of aesthetic delectation. Moreover, I needed to reduce my own personal taste to absolute zero.

To see the butcher slap the steak before he laid it on the block, and give his knife a sharpening, was to forget breakfast instantly. It was agreeable too - it really was - to see him cut it off so smooth and juicy. There was nothing savage in the act, although the knife was large and keen; it was a piece of art, high art; there was delicacy of touch, clearness of tone, skilful handling of the subject, fine shading. It was the triumph of mind over matter; quite.