Our Lord, as the lineal descendant of David, was the lawful King of the Jews, and this royal lineage according to earthly and temporal laws, was typical of His inherent royalty as the Son of God. Therefore, the key of David, or the outward and visible sign of David's royalty, is taken as expressive of His supreme dominion as Lord and Redeemer of the world. When Christ promised to give the keys of the kingdom of heaven--the keys of His own kingdom, and the symbols of His own Sovereignty--to St. Peter, He must have intended to delegate that sovereignty to him, and to constitute him His Vicar on the earth: To make it still more plain that He meant this, our Lord made a distinct and express declaration to this effect, in these words: "And whatsoever thou shalt bind upon earth, it shall be bound also in heaven; and whatsoever thou shalt loose upon earth, it shall be loosed also in heaven." {206} These words designate the plenitude of power to be conferred on St. Peter, of making laws, and binding the consciences of all to observe them, punishing transgressors, abrogating these same laws and pardoning offenders, and doing whatever else the good of the Church or its individual members may require, according to the diversity of times and circumstances. Jesus Christ gives before hand the seal and warrant of His divine authority to all these laws. This is what is called, in the language of commerce and politics, giving __carte blanche__. King Charles V. of Spain, when he sent commissioners to America to inquire into the abuses and cruelties perpetrated by the avaricious Spanish colonists against the Indians, gave them a number of blank sheets already signed and sealed with the royal sign-manual, that they might promulgate royal edicts according to their own judgment. In the same way, Jesus Christ promises that He will give to St. Peter this unlimited power of exercising jurisdiction, in His name, in the Catholic Church, with the sealed sign-manual of heaven. {207} But Jesus Christ not only promised to bestow this power on St. Peter: He made to him, after His resurrection and before His ascension, a formal grant of this power, and solemnly delivered up the care and government of His universal flock into his hands. This fact is recorded by St. John, in the twenty-first chapter of his Gospel. Everything about this chapter is mysterious and sublime in the highest degree, and every word, every circumstance, points to that high office of the Chief Pastor, and, after Christ, principal founder of the Christian religion, which was given to St. Peter.