The painter is Pablo Picasso, and the poet is Wallace Stevens:

Wallace Stevens, "The Man with the Blue Guitar" (excerpts)

I

The man bent over his guitar,
A shearsman of sorts. The day was green.

They said, "You have a blue guitar,
You do not play things as they are."

The man replied, "Things as they are
Are changed upon the blue guitar."

And they said then, "But play, you must,
A tune beyond us, yet ourselves,

A tune upon the blue guitar
Of things exactly as they are."

II

I cannot bring a world quite round,
Although I patch it as I can.

I sing a hero's head, large eye
And bearded bronze, but not a man,

Although I patch him as I can
And reach through him almost to man.

If to serenade almost to man
Is to miss, by that, things as they are,

Say it is the serenade
Of a man that plays a blue guitar.