Giorgio Vasari, Lives of the Most Excellent Painters… (1850)
“ MASACCIO, PAINTER, OF SAN GIOVANNI, IN VALDARNO. [born 1402?—died 1443.] When nature has called into existence a genius of surpassing excellence in any vocation, it is not her custom to leave him alone: on the contrary, she for the most part gives life to another, created at the same time and in the same locality, whence the emulation of each is excited and they mutually serve as stimulants one to the other. ”
