Giorgio Vasari, Lives of the Most Excellent Painters… (1850)
“ Had Piero di Cosimo been less eccentric, had he imposed a more careful restraint on himself, during the course of his long life, the extent of that genius which he certainly possessed would have been made more clearly manifest, he might indeed have rendered himself truly admirable, whereas, by the absurdity and extravagance of his life he caused himself to be considered a mere fool. In the end, however, he did no harm to any one but himself, while his works have been very beneficial to the art. ”
