Art is a mystery.
A mystery is something immeasurable.
In so far as every child and woman and man may be immeasurable, art is the mystery of every man and woman and child. In so far as a human being is an artist, skies and mountains and oceans and thunderbolts and butterflies are immeasurable; and art is every mystery of nature. Nothing measurable can be alive; nothing which is not alive can be art; nothing which cannot be art is true: and everything untrue doesn't matter a very good God damn...

"Foreword to an Exhibit: I" (1944)