If the Son of God had to sacrifice his life to absolve mankind from original sin, then, according to the law of retaliation, the return of like for like, this sin must have been an act of killing, a murder. Nothing else could call for the sacrifice of a life in expiation. And if original sin was a sin against the God Father, the oldest sin of mankind must have been a patricide--the killing of the primal father of the primitive human horde, whose memory picture later was transfigured into a deity.[3] Primitive man was as incapable of imagining and realizing his own death as any one of us are today. But a case arose in which the two opposite attitudes towards death clashed and came into conflict with each other, with results that are both significant and far reaching. Such a case was given when primitive man saw one of his own relatives die, his wife, child, or friend, whom he certainly loved as we do ours; for love cannot be much younger than the lust for murder. In his pain he must have discovered that he, too, could die, an admission against which his whole being must have revolted, for everyone of these loved ones was a part of his own beloved self. On the other hand again, every such death was satisfactory to him, for there was also something foreign in each one of these persons. The law of emotional ambivalence, which today still governs our emotional relations to those whom we love, certainly obtained far more widely in primitive times. The beloved dead had nevertheless roused some hostile feelings in primitive man just because they had been both friends and enemies. Philosophers have maintained that the intellectual puzzle which the picture of death presented to primitive man forced him to reflect and became the starting point of every speculation. I believe the philosophers here think too philosophically, they give too little consideration to the primary effective motive. I should therefore like to correct and limit the above assertion; primitive man probably triumphed at the side of the corpse of the slain enemy, without finding any occasion to puzzle his head about the riddle of life and death. It was not the intellectual puzzle or any particular death which roused the spirit of inquiry in man, but the conflict of emotions at the death of beloved and withal foreign and hated persons.