“And yet there is no possibility of question about this either, since thou seest how herbs and trees grow in places suitable for them, where, as far as their nature admits, they cannot quickly wither and die. Some spring up in the plains, others in the mountains; some grow in marshes, others cling to rocks; and others, again, find a fertile soil in the barren sands; and if you try to transplant these elsewhere, they wither away. Nature gives to each the soil that suits it, and uses her diligence to prevent any of them dying, so long as it is possible for them to continue alive. Why do they all draw their nourishment from roots as from a mouth dipped into the earth, and distribute the strong bark over the pith? Why are all the softer parts like the pith deeply encased within, while the external parts have the strong texture of wood, and outside of all is the bark to resist the weather’s inclemency, like a champion stout in endurance? Again, how great is nature’s diligence to secure universal propagation by multiplying seed! Who does not know all these to be contrivances, not only for the present maintenance of a species, but for its lasting continuance, generation after generation, forever? And do not also the things believed inanimate on like grounds of reason seek each what is proper to itself?