They fail to see that in fact a whole host of supernatural contrivances would be spared by acts of creation as occasion arose, which would be required if an embryo formed at the beginning of the world had to be preserved from the destructive forces of nature, and had to keep safe and sound all through the long ages till the day arrived for its development, and also that an incalculably greater number of such preformed entities would be created than would be destined ever to develop, and that all those would be so many creations thus rendered superﬂuous and in vain.