For, it is as impossible that the very same particle of any body should at the same time differently modify or reflect the rays of light, as that it should have two different figures and textures at the same time.
Izan ere, hain ezinezko da edozein gorputzen partikula berberak argi izpiak aldi berean ezberdinki aldarazi edo islatzea, nola den aldi berean irudi edo ehundura ezberdinak edukitzea.