A small number of simple principles serves as a basis for all bodies'; these are the ones that govern exclusively the organization of minerals; then 'the magnificence of nature' continues to increase without a break 'up to the level of the beings that move upon the surface of the globe'; 'the variation of the organs in number, in size, in refinement, in internal texture, and in external form, produces species which are divided and subdivided to infinity by new arrangements'.