16 Yet one cannot discover by any rational process of reasoning, what is the meaning of these statements. If the gods willed that the Alemanni and the Persians should be overcome because Christians dwelt among their tribes, how did they grant victory to the Romans when Christians dwelt among their peoples also? If they willed that mice and locusts should swarm forth in prodigious numbers in Asia and in Syria because Christians dwelt among their tribes too, why was there at the same time no such phenomenon in Spain and in Gaul, although innumerable Christians lived in those provinces also? If among the Gaetuli and the Tinguitani they sent dryness and aridity on the crops on account of this circumstance, why did they in that very year give the most bountiful harvest to the Moors and to the Nomads, when a similar religion had its abode in these regions as well?
If in any one state whatever they have caused many to die with hunger, through disgust at our name, why have they in the same state made wealthier, ay, very rich, by the high price of grain, not only men not of our booty, but even Christians themselves? Accordingly, either all should have had no blessing if we are the cause of the evils, for we are in all nations; or when you see blessings mixed with misfortunes, cease to attribute to us that which damages your interests, when we in no respect interfere with your blessings and prosperity.
For if I cause it to be ill with you, why do I not prevent it from being well with you? If my name is the cause of a great dearth, why am I powerless to prevent the greatest productiveness? If I am said to bring the ill luck of a wound being received in war, why, when the enemy are slain, am I not an evil augury; and why am I not set forth against good hopes, through the ill luck of a bad omen?
Source: Against the Heathen (New Advent)