Lucius Caecilius Firmianus Lactantius

This is the reason why no one obeys their precepts; inasmuch as they either train men to vices, if they defend pleasure; or if they uphold virtue, they neither threaten sin with any punishment, except that of disgrace only, nor do they promise any reward to virtue, except that of honour and praise only, since they say that virtue is to be sought for its own sake, and not on account of any other object. The wise man therefore is happy under tortures; but when he suffers torture on account of his faith, on account of justice, or on account of God, that endurance of pain will render him most happy. For it is God alone who can honour virtue, the reward of which is immortality alone. And they who do not seek this, nor possess religion, with which eternal life is connected, assuredly do not know the power of virtue, the reward of which they are ignorant; nor look towards heaven, as they themselves imagine that they do, when they inquire into subjects which do not admit of investigation, since there is no other cause for looking towards heaven, unless it be either to undertake religion, or to believe that one's soul is immortal. For if any one understands that God is to be worshipped, or has the hope of immortality set before him, his mind is in heaven; and although he may not behold it with his eyes, yet he does behold it with the eye of his soul.