Labels:text | screenshot | font OCR: On this page Leonardo offers a poetic and quite personal observation, likening human existence to the vital life of our planet earth: "Nothing grows in a spot where there is neither sentient, vegetal, nor rational life. ... We may say that the earth has a spirit of growth, and that its flesh is the soil; its bones are the successive strata of the rocks . . . its cartilage is the tufa stone; its blood the veins of its waters. The lake of the blood that lies around the heart is the ocean. Its breathing is by the increase and decrease of the blood in its pulses, and even so in the earth is the ebb and flow of the sea." A
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