As far as I know, there is no proof whatever of the existence of an objective reality apart from our senses, and I do not see why we should accept the outside world as such solely by virtue of our senses.

I might be in the basement. I'll go upstairs and check. We adore chaos because we love to produce order. I don't use drugs; my dreams are frightening enough.

I came to the ... open gate of mathematics. From here, well-trodden paths lead in every direction, and since then I have often spent time there. Sometimes I think ... I have trodden all the paths ... and then I suddenly discover a new path and experience fresh delights.

I don't use drugs, my dreams are frightening enough.

I don't grow up. In me is the small child of my early days.

Only those who attempt the absurd will achieve the impossible. I think it's in my basement... let me go upstairs and check.

A woman once rang me up and said, 'Mr. Escher, I am absolutely crazy about your work. In your print -Reptiles- you have given such a striking illustration of reincarnation.' I replied, 'Madam, if that's the way you see it, so be it.'