„Did you know that I went to London to see Whistler and that I spent about twelve days, very impressed by London and also by Whistler, who is a great artist; moreover, he could not have been more charming to me, and has invited me to exhibit at his show.“

— Claude Monet
„Somebody in Germany [the German artist Joseph Beuys, who frequently visited America to discuss and to do performances] has been talking about my 'silence', saying that it is overrated. What does that mean? [this quotes you find also in Joseph Beuys' quotes on Wikiquote], he himself heard this 'rumor' from several American artists! (Joseph Beuys continued: 'I am convinced that he [= Duchamp] knew very well what it meant. If he was unsure about it, he could have written me a letter').“
— Marcel Duchamp