His imagination would have been enriched and his maxims fortified. The emotions which Lucretius associated with his atoms and void, with his religious denials and his abstentions from action, are emotions necessarily involved in life. They will exist in any case, though not necessarily associated with the doctrines by which this poet sought to clarify them. They will remain standing, whatever mechanism we put in the place of that which he believed in,--that is, if we are serious, and not trying to escape from the facts rather than to explain them. If the ideas embodied in a philosophy represent a comprehensive survey of the facts, and a mature sentiment in the presence of them, any new ideas adopted instead will have to acquire the same values, and nothing will be changed morally except the language or euphony of the mind. Of course one theory of the world must be true and the rest false, at least if the categories of any theory are applicable to reality; but the true theory like the false resides in imagination, and the truth of it which the poet grasps is its truth to life. If there are no atoms, at least there must be habits of nature, or laws of evolution, or dialectics of progress, or decrees of providence, or intrusions of chance; and before these equally external and groundless powers we must bow, as Lucretius bowed to his atoms. It will always be important and inevitable to recognize _something_ external, something that generates or surrounds us; and perhaps the only difference between materialism and other systems in this respect is that materialism has studied more scrupulously the detail and method of our dependence. Similarly, even if Lucretius was wrong, and the soul is immortal, it is nevertheless steadily changing its interests and its possessions. Our lives are mortal if our soul is not; and the sentiment which reconciled Lucretius to death is as much needed if we are to face many deaths, as if we are to face only one. The gradual losing of what we have been and are, Emerson says: _This losing is true dying;_ _This is lordly maris down-lying,_ _This his slow but sure reclining,_ _Star by star his world resigning._