II. Introductory Explanations Concerning the Nature of Man

Observe, for instance, man's upper thigh bone; how wonderfully and in accordance with every rule of architecture the single little osseous joists and beams are put together! In its upper part, the upper thigh bone is far more complicated than it appears to us externally; for it is composed of a trestle of beams whose angles are arranged so skillfully that the weight of the whole body is borne by the least quantity of matter; truly a far greater work of art than the most complicated bridge construction; no engineering skill in the world could imitate it!