SECT.  XXII.  Of the Structure or Frame of the Animal.

Let us confine ourselves within the animal’s machine, which has three things that never can be too much admired: First, it has in it wherewithal to defend itself against those that attack it, in order to destroy it.  Secondly, it has a faculty of reviving itself by food.  Thirdly, it has wherewithal to perpetuate its species by generation.  Let us bestow some considerations on these three things.