"Wherefore, before all things, we must test the Prophet with all judgment by means of the prophetic promise; and having ascertained Him to be the Prophet, we must undoubtingly follow the other words of His teaching; and having confidence concerning things hoped for, we must conduct ourselves according to the first judgment, knowing that He who tells us these things has not a nature to lie. Wherefore, if any of the things that are afterwards spoken by Him do not appear to us to be well spoken, we must know that it is not that it has been spoken amiss, but that it is that we have not conceived it aright. For ignorance does not judge knowledge, and so neither is knowledge competent truly to judge foreknowledge; but foreknowledge affords knowledge to the ignorant.