This article reproduces some of Diego Rivera’s observations regarding his work, based on a number of sketches done in Paris and Tehuantepec “in which the penetrating sensibility of the artist may be discerned.” These sketches would later be used for the murals on the walls of the Escuela Nacional Preparatoria, the SEP [Ministry of Public Education], and the School of Agronomy in Chapingo. Further on, specific mention is made of Rivera’s working plan for the Anfiteatro Simón Bolívar at the ENP, which may be noted for its philosophically oriented concerns: “ . . . the artist chose an abstract theme: the relations between man and the elements . . . .” The “signs of the Word, beginning of everything . . . and Man, the entity previous to the masculine and feminine” are mentioned here. There are also allusions to the “original, primordial energy” as well as depictions of the serpent, knowledge, fable, tradition, erotic poetry, and symbols of prudence, justice, fortitude, and science. The article ends with the following appreciation: “Despite the painter’s effort to express genuine Mexican beauty in his characters, the work suffers—both in its execution as well as in its own internal logic—from influences that are too strong and that slowly begin to disappear in subsequent works the artist has executed.”