For in the case of inanimate things the action of fire is not universal the same on all some it condenses, others it rarefies; some it dissolves, others it hardens; and so we must suppose that in the case of animate creatures the same results are found, and we must investigate the fire of nature by comparing her processes to those of an art; for different results are achieved by fire in the work of the goldsmith, the coppersmith, the carpenter, and the cook