Vasari says, "Whoever shall desire to see how far art can imitate nature, may do so to perfection in this head, wherein every peculiarity that could be depicted by the utmost subtlety of the pencil has been faithfully reproduced. The eyes have the lustrous brightness and moisture which is seen in life, and around them are those pale, red, and slightly livid circles, also proper to nature, with the lashes, which can only be copied as these are with the greatest difficulty; the eyebrows also are represented with the closest exactitude, where fuller and where more thinly set, with the separate hairs delineated as they issue from the skin, every turn being followed and all the pores exhibited in a manner that could not be more natural than it is; the nose, with its beautiful and delicately roseate nostrils, might be easily believed to be alive; the mouth, admirable in its outline, has the lips uniting the rose-tints of their color with that of the face in the utmost perfection, and the carnation of the cheek does not appear to be painted, but truly of flesh and blood; he who looks earnestly at the pit of the throat cannot but believe that he sees the beating of the pulses, and it may be truly said that this work is painted in a manner well calculated to make the boldest master tremble, and astonishes all who behold it, however well accustomed to the marvels of art. "Mona Lisa was exceedingly beautiful; and while Leonardo was painting her portrait, he took the precaution of keeping some one constantly near her, to sing or play on instruments, or to jest and otherwise amuse her, to the end that she might continue cheerful, and so that her face might not exhibit the melancholy expression often imparted by painters to the likenesses they take. In this portrait of Leonardo's, on the contrary, there is so pleasing an expression, and a smile so sweet, that while looking at it one thinks it rather divine than human, and it has ever been esteemed a wonderful work, since life itself could exhibit no other appearance." No wonder Grimm says, "He who has seen the Mona Lisa smile is followed forever by this smile, just as he is followed by Lear's fury, Macbeth's ambition, Hamlet's melancholy, and Iphigenia's touching purity." Pater says of the Mona Lisa, "'La Gioconda' is, in the truest sense, Leonardo's masterpiece, the revealing instance of his mode of thought and work. In suggestiveness, only the 'Melancholia' of Dürer is comparable to it; and no crude symbolism disturbs the effect of its subdued and graceful mystery. We all know the face and hands of the figure, set in its marble chair, in that cirque of fantastic webs, as in some faint light under sea. Perhaps of all ancient pictures time has chilled it least. * * * * *