66 So, then, even if you are pure, and have been cleansed from every stain of vice, have won over and charmed those powers not to shut the ways against you and bar your passage when returning to heaven, by no efforts will you be able to reach the prize of immortality, unless by Christ's gift you have perceived what constitutes this very immortality, and have been allowed to enter on the true life. For as to that with which you have been in the habit of taunting us, that our religion is new, and arose a few days ago, almost, and that you could not abandon the ancient faith which you had inherited from your fathers, and pass over to barbarous and foreign rites, this is urged wholly without reason.
For what if in this way we chose to blame the preceding, even the most ancient ages, because when they discovered how to raise crops, they despised acorns, and rejected with scorn the wild strawberry; because they ceased to be covered with the bark of trees and clad in the hides of wild beasts, after that garments of cloth were devised, more useful and convenient in wearing; or because, when houses were built, and more comfortable dwellings erected, they did not cling to their ancient huts, and did not prefer to remain nuder rocks and caves like the beasts of the field?
It is a disposition possessed by all, and impressed on us almost from our cradles even, to prefer good things to bad, useful to useless things, and to pursue and seek that with more pleasure which has been generally regarded as more than usually precious, and to set on that our hopes for prosperity and favourable circumstances.
Source: Against the Heathen (New Advent)