But there is nothing which is so great a hindrance to its growth as the fleshly nature. For that, as if it were the principal and most solid foundation of folly and ignorance, is laid down firmly, and then each of the aforenamed evils is built up upon it.
 For those souls which are devoid of flesh and of the body, remaining undisturbed in the theatre of the universe, occupied in seeing and hearing divine things, of which an insatiable desire has seized them, enjoy a pleasure to which no one offers any interruption. But those which bear the heavy burden of the flesh, being weighed down and oppressed by it, are unable to look upwards to the revolutions of the heaven, but being dragged downwards, have their necks forcibly pressed to the ground like so many quadrupeds.