[219] for we must be content, if, by means of labour and diligence, we obtain a share of those good things which are familiar and customary to us. But there is no hope that we can attain to those which come of their own accord, and from some ever ready and previously prepared source, without any art, or in short, any human contrivance whatever; for inasmuch as these things are divine, they must of necessity be found out by more divine and unadulterated natures, such as have no connection with any mortal body.