If the Light illumining any Body be reflected upon the Shadows incompassing it, the Reflex's formed thereby, will alleviate, or enlighten the Shadows, in Proportion as their Light is stronger or weaker, and as they are nearer or more Remote from the Body whence the Light proceeds. This Observation is made Use of by some, and as much despised by Others: The Painters have even divided themselves into Factions about it, each Exposing and Ridiculing the other. If you would keep a just Mean, and secure your self from the Censure of either Party, make the proper use of both Opinions: Observing never to make any Reflex's, but where the Necessity of those Reflex's, and their Colours may be evident; nor ever omitting to make them, but where the Reason of such Omission, may be easily perceiv'd by every one.