• I thought that from the moment someone else could do the same as myself, there was no difference between the pictures and they should not be signed. Afterwards I realized it was not so and began to sign my pictures again. Picasso had begun again anyhow.

    "Letters of the Great Artists - From Blake to Pollock". Book by Richard Friedenthal, Translation by Daphne Woodward, p. 265, 1963.