Structures of lines, surfaces, forms, colours. They try to approach the eternal, the inexpressible above men. They are a denial of human egotism. The… - Jean Arp

I like nature but not its substitutes. Naturalist art, illusionism, is a substitute for nature. I remember that in arguing with Piet Mondrian [in Paris, 1920's], he opposed art to nature saying that art is artificial and nature is natural. I do not share this opinion. I do not think that nature is in natural opposition to art. Art's origins are natural.

These paintings, these sculptures – these objects – should remain anonymous, in the great workshop of nature, like the clouds, the mountains, the seas, the animals, and man himself. Yes! Man should go back to nature! Artists should work together like the artists of the Middle Ages.

These collages were static symmetrical constructions, portico's with pathetic vegetation, the gateway to the realm of dreams. They were done with colored paper in black, orange or blue dye plates. Although cubist painting interested me very much, not a trace of their influence was to be found in my collages.