The poets feign that Vulcan attempted the chastity of Minerva, and impatient of refusal, had recourse to force; the consequence of which was the birth of Ericthonius, whose body from the middle upwards was comely and well-proportioned, but his thighs and legs small, shrunk, and deformed, like an eel. Conscious of this defect he became the inventor of chariots, so as to show the graceful, but conceal the deformed part of his body.
This strange fable seems to carry this meaning. Art is here represented under the person of Vulcan, by reason of the various uses it makes of fire; and nature under the person of Minerva, by reason of the industry employed in her works. Art, therefore, whenever it offers violence to nature, in order to conquer, subdue, and bend her to its purpose, by tortures and force of all kinds, seldom obtains the end proposed: yet upon great struggle and application, there proceed certain imperfect births, or lame abortive works, specious in appearance, but weak and unstable in use; which are, nevertheless, with great pomp and deceitful appearances, triumphantly carried about, and shown by impostors. A procedure very familiar, and remarkable in chemical productions, and new mechanical inventions; especially when the inventors rather hug their errors than improve upon them, and go on struggling with nature, not courting her.