That Nature does nothing in vain, is a maxim established in all the schools, merely from the contemplation of the works of Nature, without any religious purpose; and, from a firm conviction of its truth, an anatomist, who had observed a new organ or canal, would never be satisfied till he had also discovered its use and intention.

One great foundation of the Copernican system is the maxim, That Nature acts by the simplest methods, and chooses the most proper means to any end; and astronomers often, without thinking of it, lay this strong foundation of piety and religion.

The same thing is observable in other parts of philosophy: And thus all the sciences almost lead us insensibly to acknowledge a first intelligent Author; and their authority is often so much the greater, as they do not directly profess that intention.
It is with pleasure I hear GALEN reason concerning the structure of the human body.

The anatomy of a man, says he [De formatione foetus], discovers above 600 different muscles; and whoever duly considers these, will find, that, in each of them, Nature must have adjusted at least ten different circumstances, in order to attain the end which she proposed; proper figure, just magnitude, right disposition of the several ends, upper and lower position of the whole, the due insertion of the several nerves, veins, and arteries: So that, in the muscles alone, above 6000 several views and intentions must have been formed and executed.

The bones he calculates to be 284: The distinct purposes aimed at in the structure of each, above forty.