Giorgio Vasari, Lives of the Most Eminent Painters Sculptors and Architects…
“ Andrea del Verrocchio, a Florentine, was in his day a goldsmith, a master of perspective, a sculptor, a wood-carver, a painter, and a musician; but in the arts of sculpture and painting, to tell the truth, he had a manner somewhat hard and crude, as one who acquired it rather by infinite study than by the facility of a natural gift. Even if he had been as poor in this facility as he was rich in the study and diligence that exalted him, he would have been most excellent in those arts, which, for their highest perfection, require a union of study and natural power. ”
