VI. The Law of Destiny

Another example is afforded by certain animals whose organ of sight has atrophied in consequence of having made their home in dark holes and caves. In such animals, the substances which formerly nourished the eyes were led to other parts of the body because as it was no longer necessary for the eye to see, these substances were not required. The eyes atrophied and remain atrophied in all subsequent generations. Through their earlier wanderings these animals determined the actual behaviour of their organs; the destiny of subsequent generations was determined by what had happened in the past; these animals prepared their destiny for the future. And it is the same in human life.