The banishing of ends and forms from the universe has seemed to many an ideal and spiritual impoverishment. When nature was regarded as a set of mechanical interactions, it apparently lost all meaning and purpose. Its glory departed. Elimination of differences of quality deprived it of beauty. Denial to nature of all inherent longings and aspiring tendencies toward ideal ends removed nature and natural science from contact with poetry, religion and divine things. There seemed to be left only a harsh, brutal despiritualized exhibition of mechanical forces. As a consequence, it has seemed to many philosophers that one of their chief problems was to reconcile the existence of this purely mechanical world with belief in objective rationality and purpose--to save life from a degrading materialism. Hence many sought to re-attain by way of an analysis of the process of knowing, or epistemology, that belief in the superiority of Ideal Being which had anciently been maintained on the basis of cosmology. But when it is recognized that the mechanical view is determined by the requirements of an experimental control of natural energies, this problem of reconciliation no longer vexes us. Fixed forms and ends, let us recall, mark fixed limits to change. Hence they make futile all human efforts to produce and regulate change except within narrow and unimportant limits. They paralyze constructive human inventions by a theory which condemns them in advance to failure. Human activity can conform only to ends already set by nature. It was not till ends were banished from nature that purposes became important as factors in human minds capable of reshaping existence. A natural world that does not subsist for the sake of realizing a fixed set of ends is relatively malleable and plastic; it may be used for this end _or_ that. That nature can be known through the application of mechanical formulae is the prime condition of turning it to human account. Tools, machines are means to be utilized. Only when nature is regarded as mechanical, is systematic invention and construction of machines relevant to nature's activities. Nature is subdued to human purpose because it is no longer the slave of metaphysical and theological purpose.