John wept because He knew what the Book was, and that if there was no one to open that Book of Redemption, all hope of the redemptions of the earth and of man was gone.

        John's sorrow was short, for one of the Elders said, "Weep not: behold, the Lion of the Tribe of Judah, the Root of David, hath prevailed to open the Book, and to loose the Seven Seals thereof."