The more I study Nature, the more I become impressed with...

The more I study Nature, the more I become impressed with ever-increasing force that the contrivances and beautiful adaptations slowly acquired through each part, occasionally varying in a slight degree, but in many ways, with the preservation of those variations which were beneficial to the organism under complex and ever-varying conditions of life, transcend in an incomparable manner the contrivances and adaptations which the most fertile imagination of man could invent.