12. God swore to David that of the fruit of his loins, according to the flesh, He would raise up the Christ, as the prophet said and as the great Peter interpreted. But if God the Word was called Christ after mutation into flesh, we shall nowhere find the truth in the oaths. Yet we have been taught that God cannot lie; nay rather is Himself the truth. Therefore God the Word did not undergo change into flesh, but in accordance with the promise, took firstfruits of David’s seed.