Behind the animal's instinct for self-preservation there is only a purely primitive and unintellectual consciousness or mentality. The animal can maintain his life only by purely physical abilities and powers. And as its maintenance of life is to a great extent dependent on animal food, its physical abilities and powers to a corresponding degree must be developed in order to be superior to the animals that it must hunt and kill in order to appropriate their organisms as food. It is thus vital for the animal to kill in order to live. And here the maintenance of life is a question of power. Here there is no talk of any form of justice or any fifth commandment, "Thou shalt not kill." Here, on the contrary, the commandment is "Thou must kill in order to live."
      As the human being is a being evolving from this animal area, he will, to the extent that he has progressed in this evolution, represent a correspondingly higher step in evolution. He is no longer an animal pure and simple. The new stage in evolution has given him new abilities and characteristics that raise him more or less above the animal stage, so that it is in reality no longer a vital necessity for him to kill animal life in order to live. Here the commandment is "Thou shalt not kill." Indeed, is not the entire condition of life here included in this one great commandment, which is the fulfilment of all the laws, "Thou shalt love God above all things and thy neighbour as thyself"? The fulfilment of this behaviour is thus the pinnacle of life in the new area of evolution.