For example, no one could easily persuade an Egyptian to despise what he had learned from his fathers, so as no longer to consider this or that irrat… - Origen

Here I would observe that I cannot see how those whom he speaks of as abstaining from certain victims, in accordance with the traditions of their fathers, are consequently bound to abstain from the flesh of all animals. We do not indeed deny that the divine word does seem to command something similar to this, when to raise us to a higher and purer life it says, “It is good neither to eat flesh, nor to drink wine, nor anything whereby thy brother stumbleth, or is offended, or is made weak;” (Rom. xiv. 21) and again, “Destroy not him with thy meat, for whom Christ died;”(Rom. xiv. 15) and again, “If meat make my brother to offend, I will eat no flesh while the world standeth, lest I make my brother to offend.”(I Co. viii. 13)

Now that we have dealt, therefore, with this point, that the divine scriptures were inspired by the Holy Spirit, it appears necessary also to explain how some men have involved themselves in numerous errors through not reading or understanding them aright, because the method by which we should approach the interpretation of the divine writings is unknown to the multitude. For the Jews, owing to their hardness of heart and their desire to appear wise in their own sight. They have refused to believe in our Lord and Savior because they suppose that the prophecies that relate to him must be understood literally.

And therefore, so far as we are concerned, the followers of Pythagoras, who abstain from all things that contain life may do as they please; only observe the different reason for abstaining from things that have life on the part of the Pythagoreans and our ascetics. For the former abstain on account of the fable about the transmigration of souls, as the poet says:—“And some one, lifting up his beloved son,Will slay him after prayer; O how foolish he!”We, however, when we do abstain, do so because “we keep under our body, and bring it into subjection,” (Cf. I Co. ix. 27) and desire “to mortify our members that are upon the earth, fornication, uncleanness, inordinate affection, evil concupiscence;” (Cf. Col. iii. 5) and we use every effort to “mortify the deeds of the flesh.” (Cf. Rom viii. 13)