21. That in the passion and the sign of the cross is all virtue and power. In Habakkuk: “His virtue covered the heavens, and the earth is full of His praise, and His splendour shall be as the light; there shall be horns in His hands. And there the virtue of His glory was established, and He founded His strong love. Before His face shall go the Word, and shall go forth unto the plains according to His steps.” 4076 In Isaiah also:  “Behold, unto us a child is born, and to us a Son is given, upon whose shoulders shall be government; and His name shall be called the Messenger of a mighty thought.” 4077 By this sign of the cross also Amalek was conquered by Jesus through Moses. In Exodus Moses said to Jesus: “Choose thee out men, and go forth, and order yourselves with Amalek until the morrow. Behold, I will stand on the top of the hill, and the rod of God in mine hand. And it came to pass, when Moses lifted up his hands, Israel prevailed; but when Moses had let down his hands, Amalek waxed strong. But the hands of Moses were heavy; and they took a stone, and placed it under him, and he sat upon it and Aaron and Hur held up his hands, on the one side and on the other side; and the hands of Moses were made steady even to the setting of the sun. And Jesus routed Amalek and all his people. And the Lord said unto Moses, Write this, that it may be a memorial in a book, and tell it unto the ears of Jesus, that I may utterly destroy the memory of Amalek from under heaven.” 4078 4076     Hab. iii. 3–5 . 4077     Isa. ix. 6 . 4078     Ex. xvii. 9–14 .