77 Therefore that bitterness of persecution of which you speak is our deliverance and not persecution, and our ill-treatment will not bring evil upon us, but will lead us to the light of liberty. As if some senseless and stupid fellow were to think that he never punished a man who had been put into prison with severity and cruelty, unless he were to rage against the very prison, break its stones in pieces, and burn its roof, its wall, its doors; and strip, overthrow, and dash to the ground its other parts, not knowing that thus he was giving light to him whom he seemed to be injuring, and was taking from him the accursed darkness: in like manner, you too, by the flames, banishments, tortures, and monsters with which you tear in pieces and rend asunder our bodies, do not rob us of life, but relieve us of our skins, not knowing that, as far as you assault and seek to rage against these our shadows and forms, so far you free us from pressing and heavy chains, and cutting our bonds, make us fly up to the light.
Source: Against the Heathen (New Advent)