The Israelites or Jews up to the time of Christ were not by any means a spiritual nation. They had a god of the flesh; a sort of cannibal god; a politico-religious god, in whose name every kind of horror and brutality was committed. This was not Paul's God. The garb of Socratic and Platonic philosophy adorns the spiritual phase of Paul's idea. The dual existence is distinctly set forth (Cor. xv, 44): "There is a natural body and there is a spiritual body." "For the spirit itself beareth witness with our spirit, that we are the children of God" (Rom. viii, 16). "Likewise the spirit helpeth our infirmities" (26). "For if ye live after the flesh ye shall die" (13). "For as many as are led by the spirit of God, they are the sons of God" (14). The notion of Paul throughout his epistles of what he terms flesh and spirit, separating them as two distinct parts of the body, and as having a dual existence, on one side the spiritual, the godly, on the other the fleshy, the sinful, the earthly--is due to the educational doctrines that then were in vogue. The anatomical knowledge was limited, and the physiological workings of the nervous system, the functions of the brain, were entirely unknown. The flesh and spirit were the representatives of the muscular and nervous tissue, flesh of the muscular, spirit of the nervous. One of the most mysterious or hidden secrets was this function of the brain. The absence of any positive knowledge of the nervous system until recent times, caused many errors to creep in, and many false impressions were received by mistake; and these blunders through ignorance have remained to a very considerable extent fixed and unaltered. Grecian philosophers who were attempting to give a reason, or account, for the various mental phenomena, came to conclusions which are to-day seen to be contrary to scientific truth. He, Paul, embodied in his writings all the speculative philosophy known at his time. This dual existence had been taught among the Greeks for several centuries. When Paul wrote to the Romans he was in Corinth, and when he wrote to the Corinthians he was at Philippi, Macedonia. The rest of his epistles were written partly from Greece, but mostly from Rome or Italy.