Renoir once said the same color, applied by two different hands, would give us two different tones.
In music, the same note, written by two different composers, gives us – the same note.
When I write a B flat, and Berio writes a B flat, what you get is always a B flat.
The painter must create his medium as he works. That’s what gives his work that hesitancy,
that insecurity so crucial to painting. The composer works in preexistent medium.
In Painting if you hesitate, you become immortal. In music if you hesitate, you are lost.

Some Elementary Questions, Morton Feldman