We didn't want to sign the painting itself, that would have interfered with the composition. And even later, for that reason or for another, I sometimes marked my canvases on the back. If you don't see my signature and the date, madam, it's because the frame is hiding it.
Pablo PicassoA painting is not thought out in advance. While it is being done, it changes as oneโs thoughts change. And when itโs finished, it goes on changing, according to the state of mind of whoever is looking at it
Pablo Picasso