The meaning would be muffled if it weren't as concise as it is now.
It operates on two levels. The first being an allegory for the praise of art and profound expression from so little. Art allows you to create a "cosmos" of creativity and imagination from mere paint on a wall.
The second level is with a negative connotation. That your entire worldview can be seen as nothing but paint on a wall. Your "cosmos" is nothing short of superficial, and tacky.
There are two complex layers working in this piece. It can be flexible either way; it can be a creative manifesto, or a prolific statement on nihilism.