...to work from imagination alongside the effects of nature; but they use such devices only to relieve themselves somewhat of labour, and not to fail in any particle of the true imitation of that thing which must with precision be made to resemble its model. But this invention is to be blamed in those who cannot draw of themselves, nor discourse with their own intellect, because with such laziness they are destroyers of their own genius, and never know how to do anything good without such aid; and these are always poor and wretched in all their invention or composition of histories, which is the end of such science, as shall be shown in its place. [40] Comparison of painting to sculpture. Painting is of greater mental discourse, and of greater artifice and marvel, than sculpture, since necessity constrains the mind of the painter to transmute itself into the very mind of nature, and to be interpreter between that nature and art, expounding with art the causes of nature's demonstrations constrained by her law; and in what manner the similitudes of the objects surrounding the eye concur with the true simulacra to the pupil of the eye; and among objects equal in size, which will show itself greater to that eye; and among equal colours, which will show itself more or less dark, or more or less light; and among things of equal lowness, which will show itself more or less low; and of those set at equal height, which will show itself more or less high; and of objects equal, set at