For both he that sanctifies and they who are sanctified are all of one: for which cause he is not ashamed to call them brethren,
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Cyprian of Carthage
AD 258
Is drawn away with the rent portions of the flesh; still he stands immoveable, the stronger for his sufferings, revolving only this in his mind, that in that brutality of the executioners Christ Himself is suffering.
For both he who sanctifieth, (i.e. our Redeemer, who sanctifieth, or has obtained sanctification for all, by sacrificing himself on the cross) and they who are sanctified, are all of one; have the same human nature, and are from the same first parent Adam, whose Son, (Christ) as man, was; on which account he calls men his brethren. See John xx. 17. and Psalm xxi. 23., in which is a clear prediction of Christ's sufferings, where it is said: I will declare thy name to my brethren (Witham)
5. For, he says, both He that sanctifies, and they who are sanctified, are all of one, for which cause He is not ashamed to call them brethren. Behold again how he brings [them] together, honoring and comforting them, and making them brethren of Christ, in this respect that they are of one. Then again guarding himself and showing that he is speaking of that which is according to the flesh, he introduces, For He who sanctifies, [i.e.] Christ, and they who are sanctified, ourselves. Do you see how great is the difference? He sanctifies, we are sanctified. And above he said, the Captain of their salvation. For there is one God, of whom are all things. 1 Corinthians 8:6