Farming and Philosophy

Of the Stoics, the cynic Diogenes Laertius reports:

"Philosophy, they say, is like an animal, logic corresponding to the bones and sinews, ethics to the fleshy parts, physics to the soul. Another simile they use is that of an egg: the shell logic, next comes the white, ethics, and the yolk in the center is physics. Or again, they liken philosophy to a fertile field: logic being the encircling fence, ethics the crop, physics the soil or the trees..."