Augustine of Hippo : If a prophet or a seer of dreams appears in the midst of you and gives you a sign or a miracle, and that sign or miracle is made to you, saying, "Let us go and serve other gods, which you do not know," you will hear the words of that prophet or of that seer of dreams, for the Lord your God is testing you to know whether you love the Lord your God with all your heart and with all your soul. Some Latin translators did not put: to know (scire) if you love, but: so that you know (ut sciat) if you love. Although the meaning of the phrase seems the same, however, the expression: to know (scire) refers more easily to the Israelites. So the phrase: I try to know, is equivalent to: "testing you makes you know." And here, of course, the Lord wanted them to understand also those things that the fortune-tellers say, that they do not agree with God if what they say happens. And these things do not have to be taken as if what they command or venerate the things they revere. And God does not say that the fact that these things happen is beyond his power. It exposes rather, as if it were asked why it allows them, that the motive of the test is to know the love that they have and if that love is a love to their God. And, of course, it is they who must know if they love him, and not God, because God knows all things before they happen. — QUESTIONS ON DEUTERONOMY, Q. 19 (tr. J. Litteral, draft)