He who acknowledges a kindness has it still, and he who has a grateful sense of it has requited it.
Marcus Tullius CiceroOn the subject of the nature of the gods, the first question is Do the gods exist or do the not? It is difficult you may say to deny that they exist. I would agree if we were arguing the matter in a public assembly, but in a private discussion of this kind, it is perfectly easy to do so.
Marcus Tullius Cicero