29. And Moses said, Behold I go out from thee. Moses does not reply to this demand, because he knew that the design of God was otherwise; and God had justly left him in ignorance as to what He did not yet wish him to know. There is, then, no reason why Moses should be accused of bad faith when he faithfully fulfilled the charge committed to him; although he was silent as to what he was not ordered to declare, even as to that which God wished to be concealed from the tyrant. But the holy Prophet, aroused to pious indignation by the king’s perfidy, does not immediately remove the plague, but waits till the morrow; and moreover, denounces with severity that, if he should persist in deceit, its punishment awaited him. This great magnanimity he had derived from the miracles, for, having experienced in them the unconquerable power of God, he had no cause for fear. For it was an act of extraordinary boldness openly and before the tyrant’s face to reproach him for his falsehoods, and at the same time to threaten him with punishment unless he desisted from them. But we said before that Moses had not acted from the workings of his own mind, when he promised Pharaoh what he asked, but that he had spoken thus confidently from special impulse. For the general promise in which God affirms that He will grant the prayers of His servants, must not be applied to particular cases, so that they should expect to obtain this or that in a specified manner, unless they have some peculiar testimony from the word or the Spirit of God.