Meditations of Marcus Aurelius Book IX
He who acts unjustly acts impiously. For since the universal nature has made rational animals for the sake of one another to help one another according to their deserts, but in no way to injure one another, he who transgresses her will, is clearly guilty of impiety towards the highest divinity. And he too who lies is guilty of impiety to the same divinity; for the universal nature is the nature of things that are; and things that are have a relation to all things that come into existence. And further, this universal nature is named truth, and is the prime cause of all things that are true. He then who lies intentionally is guilty of impiety inasmuch as he acts unjustly by deceiving; and he also who lies unintentionally, inasmuch as he is at variance with the universal nature, and inasmuch as he disturbs the order by fighting against the nature of the world; for he fights against it, who is moved of himself to that which is contrary to truth, for he had received powers from nature through the neglect of which he is not able now to distinguish falsehood from truth. And indeed he who pursues pleasure as good, and avoids pain as evil, is guilty of impiety. For of necessity such a man must often find fault with the universal nature, alleging that it assigns things to the bad and the good contrary to their deserts, because frequently the bad are in the enjoyment of pleasure and possess the things which procure pleasure, but the good have pain for their share and the things which cause pain. And further, he who is afraid of pain will sometimes also be afraid of some of the things which will happen in the world, and even this is impiety. And he who pursues pleasure will not abstain from injustice, and this is plainly impiety. Now with respect to the things towards which the universal nature is equally affected -- for it would not have made both, unless it was equally affected towards both -- towards these they who wish to follow nature should be of the same mind with it, and equally affected. With respect to pain, then, and pleasure, or death and life, or honour and dishonour, which the universal nature employs equally, whoever is not equally affected is manifestly acting impiously. And I say that the universal nature employs them equally, instead of saying that they happen alike to those who are produced in continuous series and to those who come after them by virtue of a certain original movement of Providence, according to which it moved from a certain beginning to this ordering of things, having conceived certain principles of the things which were to be, and having determined powers productive of beings and of changes and of such like successions.