What is morally wrong can never be advantageous, even when it enables you to make some gain that you believe to be to your advantage. The mere act of believing that some wrongful course of action constitutes an advantage is pernicious.
Marcus Tullius CiceroAll literature, all philosophical treatises, all the voices of antiquity are full of examples for imitation, which would all lie unseen in darkness without the light of literature.
Marcus Tullius CiceroThe more virtuous any man is, the less easily does he suspect others to be vicious.
Marcus Tullius Cicero