In the 1930s, Wallace Stevens`s poetry underwent a major transition from Harmonium (1923) to The Man with the Blue Guitar (1937). The social upheaval of the 1930s forced him to reevaluate his aesthetic position, to develop a poetic voice that would be socially responsible, and to allow full play to his highly cultivated talent. He wrote his most successful poem to date, "The Man with the Blue Guitar." Stevens starts the poem with two voices, the guitarist``s and the people`s. This poem deals with "incessant conjunction of things as they are and things imagined." "The Man with the Blue Guitar" is associated with Picasso`s well-known painting, "The Old Guitarist." Stevens`s use of imagery in the poem and his concern with reality correlate with Picasso`s movement toward Cubism. Both announce through their own medium that "reality is dynamic, as constantly changing as man`s perceptions constantly change." For them, the notions of "an ultimate truth, a static form of reality, and a final representation of the nature of things," are denied. This is closely related with Bergson`s notion of reality: for Bergson, all genuine thought is the continuous becoming of things. Duration is the only reality to what extent his time concept is based on the link between the pure past and the present. "The Man with the Blue Guitar" celebrates "incessant conjunction" between things as they are and the blue guitar, between reality and imagination, between life and art. Imagination is an essential tool for a poet who must be able to combine the forces of nature and his mind.