The main theme for which Paul contends in most of his epistles was vital to the life of the early church,--that its members were not to be held to observance of the Jewish ritual. In support of that theme, Paul develops his philosophy of the universe. The main lines of that philosophy are essentially these: that when God had created man, man's sin incurred the penalty of death; that God chose the Jews as his peculiar people, and gave them the code of laws contained in the books of Moses; that the law was too difficult for weak human nature to perfectly obey, so that death still reigned on earth, with dire penalty impending in the afterworld; that God then had recourse to another plan. He sent his Son into the world, who became a man, taking on him that fleshly nature which is the occasion and the symbol of human transgression, but which he wore in perfect holiness. God then caused this fleshly nature of Jesus to die upon the cross, while the spiritual nature outlived the perishing body, appeared in radiant form to men, and returned to the eternal realm. By this visible sign God made proclamation to mankind, "Die unto sin by forsaking sin, and I will give you holiness which issues in eternal life. The death and resurrection of my son, Jesus Christ, are the token and promise of my free gift, which only asks your acceptance. Accept it, by turning from sin, and you shall receive the sense of companionship with Christ, and the consciousness of a divine power working in you and in the world. Of set laws you have no longer need; rites and ceremonies were but the type of the reality which now is freely given to you. Your sole obligation is to love; your fidelity to that shall constantly merge in the sense of joyful freedom; the imperfect attainment of earth shall issue into the eternal felicity of heaven." In such language we try to restate Paul's philosophy. Thus, or somewhat thus, he thought. Just how he thought we can never be sure, nor does it matter. The mould of his belief was so different from ours that all which closely concerns us is to discern if we can what was the kernel of genuine experience, the permanent reality and truth, which vivified this world-scheme.