The more extended our Reason is, and the more able to grapple with immense Objects, the greater still are those Discoveries which it makes of Wisdom and Providence in the Work of the Creation.  A Sir Isaac Newton, who stands up as the Miracle of the Present Age, can look through a whole Planetary System; consider it in its Weight, Number, and Measure; and draw from it as many Demonstrations of infinite Power and Wisdom, as a more confined Understanding is able to deduce from the System of an Human Body.

But to return to our Speculations on Anatomy.  I shall here consider the Fabrick and Texture of the Bodies of Animals in one particular View; which, in my Opinion, shews the Hand of a thinking and all-wise Being in their Formation, with the Evidence of a thousand Demonstrations.  I think we may lay this down as an incontested Principle, that Chance never acts in a perpetual Uniformity and Consistence with it self.  If one should always fling the same number with ten thousand Dice, or see every Throw just five times less, or five times more in Number than the Throw which immediately preceded it, who would not imagine there is some invisible Power which directs the Cast?  This is the Proceeding which we find in the Operations of Nature.  Every kind of Animal is diversified by different Magnitudes, each of which gives rise to a different Species.  Let a Man trace the Dog or Lion-Kind, and he will observe how many of the Works of Nature are published, if I may use the Expression, in a variety of Editions.  If we look into the Reptile World, or into those different Kinds of Animals that fill the Element of Water, we meet with the same Repetitions among several Species, that differ very little from one another, but in Size and Bulk.  You find the same Creature that is drawn at large, copied out in several Proportions, and ending in Miniature.  It would be tedious to produce Instances of this regular Conduct in Providence, as it would be superfluous to those who are versed in the natural History of Animals.  The magnificent Harmony of the Universe is such, that we may observe innumerable Divisions running upon the same Ground.  I might also extend this Speculation to the dead Parts of Nature, in which we may find Matter disposed into many similar Systems, as well in our Survey of Stars and Planets, as of Stones, Vegetables, and other sublunary Parts of the Creation.  In a Word, Providence has shewn the Richness of its Goodness and Wisdom, not only in the Production of many Original Species, but in the Multiplicity of Descants which it has made on every Original Species in particular.