Irenaeus Against Heresies Book IV But I so run, not as uncertainty; I fight, not as One beating the air; but I make my body livid, and bring it into subjection, lest by any means, when preaching to others, I may myself be rendered a castaway."[617] Cyprian Epistle VIII "Do ye not know," says he, "that they which run in a race, run all indeed, but one receiveth the prize? So run that ye may obtain." "Now they do it that they may receive a corruptible crown, but we an incorruptible."[8] Cyprian Treatise XI Exhortation to Martyrdom Addressed to Fortunatus And they, indeed, that they may receive a corruptible crown; but ye an incorruptible."[59] Cyprian Treatise XII Three Books of Testimonies Against the Jews In the first Epistle of Paul to the Corinthians: "Know ye not, that they which run in a race run indeed all, although one receiveth the prize? So run, that ye may obtain. And those indeed that they may receive a corruptible crown, but we an incorruptible."[547] Pseudo-Cyprian On the Glory of Martyrdom And to return to the praise of martyrdom, there is a word of the blessed Paul, who says; "Know ye not that they who run in a race strive many, but one receiveth the prize? But do ye so run, that all of you may obtain."[26]