Martin "Ramírez has become one of the stars of the untutored cohort, not only for his sad life story but also because his drawings are unusually large and as mysterious as neolithic cave paintings.
"His hermetic images of tunnels, trains, and cowboys framed in prosceniums, while visually compelling, suggest a mind locked in a perpetual cycle of trying to regain a grip on reality.
"Yet Ramírez doesn't ramble; he organizes space skillfully and achieves hypnotic effects through bold repetition of line. Emotionally his drawings are self-contained and offer viewers few entry points, but graphically they are powerful projections."
Review of " 'Great and Mighty Things': Outsider Art From the Jill and Sheldon Bonovitz Collection" at the Philadelphia Museum of Art, March 3, 2013