The soul is the original spark of the Creator's mind that was released during the explosion at the beginning of creation. The Creator's purpose in shattering Himself was to learn, grow and evolve and experience His planets. He could not do this as a whole mind. He had to individualize Himself in order to enter the animal/caveman bodies that populated the earth. In "The Soul," we learn how the soul's progress is charted and how the different incarnations are planned in the birthing-computer rooms. The processes of birth into the physical realm and birth into the spiritual worlds (death) are explained. We are told of the many opportunities for growth that are present in between lives on earth. We also learn of the requirements to achieve eternal life.Someday the animals will evolve to the same stage as a human who is not expressing the soul. Without allowing the growth of the soul to take place humans are not much higher on the evolutionary pole than the animals. The soul is that part of a person that has reincarnated over and over again to constantly perfect itself. This is its only concern - absolute perfection. Your immediate concern is your personal soul, your piece of the Creator that goes with you when you cross over.The best way of determining soul growth is a very private thing between a man and his soul. He, alone, will know if a concept rings true for him or not. If it doesn't ring true he must determine if he has moved past the truth of this particular concept or if it is beyond his understanding at that time. The whole path of progress, the whole picture, would "blow the circuits" of most people on earth. The soul is a necessary part of the physical form that is used on planet four, earth, but was not present on the first, second or third planet and is not present after planet number four.