To obtain a better understanding of what constitutes Initiation and what the prerequisites are, let the student first fix firmly in his mind the fact that humanity as a whole is slowly progressing upon the path of evolution, and thus very slowly, almost imperceptibly, attaining higher and higher states of consciousness. The path of evolution is a spiral when we regard it from the physical side only, but a lemniscate when viewed in both its physical and spiritual phases. (See the diagram of chemical caduceus in _The Rosicrucian Cosmo-Conception_, page 410.) In the lemniscate, or figure 8, there are two circles which converge to a central point, which circles may be taken to symbolize the immortal spirit, the evolving ego. One of the circles signifies its life in the physical world from birth to death. During this span of time it sows a seed by every act and should reap in return a certain amount of experience. But as we may sow seed in the field and lose return on that which falls on stony ground, among thorns, et cetera, so also may the seed of opportunity be wasted because of neglect to till the soil and the life will then be barren of fruit. Conversely, as diligence and care in cultivation increase the productive power of garden seed enormously, so earnest application to the business of life—improvement of opportunities to learn life’s lessons and extract from our environment the experience it holds—brings added opportunities; and at the end of the life-day the ego finds itself at the door of death laden with the richest fruits of life. The objective work of physical existence over, the race run, and the day of action spent, the ego enters upon the subjective work of assimilation accomplished during its sojourn in the invisible worlds, which it traverses during the period from death to birth, symbolized by the other ring of the lemniscate. As the method of accomplishing this assimilation has been most minutely described in various parts of our literature, it is needless to repeat it here. Suffice it to say that at the time when an ego arrives at the central point in the lemniscate, which divides the physical from the psychic worlds and which we call the gate of birth or death according to whether the ego is entering or leaving the realm where we, ourselves, happen to be at the time, it has with it an aggregate of faculties or talents acquired in all its previous lives, which it may then put to usury or bury during the coming life-day as it sees fit; but upon the use it makes of what it has, depends the amount of soul growth it makes.