one might very well be looking at

"The last and most important aspect of what we have called the process of flattening in modem art is the flattening out of values. To understand this one can begin at the simplest level in painting, where it means merely that large and small objects are treated as of equal value. Cézanne paints apples with the same passionate concentration as he paints mountains, and each apple is as monumental as a mountain. Indeed, in some of Cézanne’s still lifes, if one covers up all of the picture except a certain patch of folded tablecloth, one might very well be looking at the planes and peaks of his Mont Saint Victoire. For Cézanne the painting dictates its own values: little and big, high and low, sublime and ordinary outside the painting are of equal importance if in a given painting they play the same plastic role."

Could you please help me to understand the blue sentence?

Thank you.

Cadzao