[71] Nevertheless, this point also is worthy of one consideration: that everything which is born must by all means at the beginning be imperfect, but as time advances he must increase till he arrives at complete perfection, so that if the world was born it was at one time (that I may use the expressions appropriate to the ages of men) a mere infant, and subsequently increasing in periods of years and lapse of time, it at last and with great difficulty arrived at perfection, for of necessity the period at which that which of all things has the longest existence must be late.