I considered that the painter's personality should be kept out of things, and therefore pictures should be anonymous. It was I who decided that pictures should not be signed, and for a time Picasso did the same. 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. I realized that one cannot reveal oneself without mannerism, without some evident trace of one's personality. But all the same one should not go too far in that direction..

p. 265 - 'In conversation with Dora Vallier' (1954)