The movements of nature are in a never ending circle. The animal species which has once been put into a train of motion, is still probably moving in that train. For if one link in nature's chain might be lost, another and another might be lost, till this whole system of things should evanish by piece-meal; a conclusion not warranted by the local disappearance of one or two species of animals, and opposed by the thousands and thousands of instances of the renovating power constantly exercised by nature for the reproduction of all her subjects, animal, vegetable, and mineral.
Thomas JeffersonOf distinction by birth or badge, [Americans] had no more idea than they had of the mode of existence in the moon or planets. They had heard only that there were such, and knew that they must be wrong.
Thomas JeffersonWe shall all consider ourselves unauthorized to saddle posterity with our debts, and morally bound to pay them ourselves; and consequently within what may be deemed the period of a generation, or the life of the majority.
Thomas Jefferson