31 We wish, then, to question you, and invite you to answer a short question, Whether you think it a greater offense to sacrifice to them being neither wishes nor desires these; or, with foul beliefs, to hold opinions about them so degrading, that they might rouse any one's spirit to a mad desire for revenge? If the relative importance of the matters be weighed, you will find no judge so prejudiced as not to believe it a greater crime to defame by manifest insults any one's reputation, than to treat it with silent neglect.
For this, perhaps, may be held and believed from deference to reason; but the other course manifests an impious spirit, and a blindness despaired of in fiction. If in your ceremonies and rites neglected sacrifices and expiatory offerings may be demanded, guilt is said to have been contracted; if by a momentary forgetfulness any one has erred either in speaking or in pouring wine; or again, if at the solemn games and sacred races the dancer has halted, or the musician suddenly become silent—you all cry out immediately that something has been done contrary to the sacredness of the ceremonies; or if the boy termed patrimus let go the thong in ignorance, or could not hold to the earth: and yet do you dare to deny that the gods are ever being wronged by you in sins so grievous, while you confess yourselves that, in less matters, they are often angry, to the national ruin?
Source: Against the Heathen (New Advent)