2 For we— but, perhaps, you c rob and deprive us of common-sense— feel and perceive that none of these has divine power, or possesses a form of its own; but that, on the contrary, they are the excellence of manhood, the safety of the safe, the honour of the respected, the victory of the conqueror, the harmony of the allied, the piety of the pious, the recollection of the observant, the good fortune, indeed, of him who lives happily and without exciting any ill-feeling. Now it is easy to perceive that, in speaking thus, we speak most reasonably when we observe the contrary qualities opposed to them, misfortune, discord, forgetfulness, injustice, impiety, baseness of spirit, and unfortunate weakness of body. For as these things happen accidentally, and depend on human acts and chance moods, so their contraries, named after more agreeable qualities, must be found in others; and from these, originating in this wise, have arisen those invented names.
Source: Against the Heathen (New Advent)