[100] Again, all those things which derive their origin from seed are of a greater magnitude than the seed which gives them their existence, and are seen to fill a more extended space; for very often trees, whose tops reach to heaven itself, shoot up out of a very small grain of seed; and the fattest and tallest animals grow from a very small quantity of moisture, which is laid as their foundation; but there happens that which was mentioned a little while ago, that these, at the time nearest to their birth are very little, but that subsequently they keep on increasing in size till they arrive at complete perfection.