St. John Chrysostom, Sermo in Matt. 1:22-23: “For it is true, the prayers of the saints have the greatest power; on condition however of our repentance and amendment. Since even Moses, who had rescued his own brother and six hundred thousand men from the wrath that was then coming upon them from God, had no power to deliver his sister; and yet the sin was not equal; for whereas she had done despite but to Moses, in that other case it was plain impiety, what they ventured on.”