[48] For he thinks that it behoves him to adhere to the classification arising from the consideration of time, according to which, that which is oldest is entitled to priority, and after that, that which is the younger is admitted to a participation in their joint rights. But the practiser of wisdom, knowing that natures are not subject to time, desires what is younger first, and what is older afterwards. And moral reason agrees with him in this matter, for it is necessary for those who practise anything, first of all to come to the more recent learning, in order that after that, they may be able to derive advantage from that which is more perfect.