...And the mode and order predestined by God in the Incarnation of His Divine Son was this: that the Most Sacred Humanity of Jesus Christ was to be taken, but without sin, from that same human nature which had sinned in Adam; that It was to descend from the blood of Abraham, to be of the tribe of Juda and the race of David, and that the Body of Jesus was to be formed by the power of the Holy Ghost in the pure womb of an immaculate virgin. This elect virgin is Mary; and therefore Mary, after Jesus, was immediately comprised in the decree of the Divine Incarnation, and from eternity predestined to be the most august Mother of the Son of God....
But, in order to conceal this mystery of love from the world until the appointed time had come, and to safeguard at the same time the reputation of the Virgin Mother and the honour of the Divine Son, God willed that Mary by a marriage altogether heavenly should be espoused to the humblest, the purest, and the holiest of the royal race of David, one therefore expressly predestined for this end; a virgin spouse for the Virgin Mother, who at the same time should be in the place of a father to the Divine Son. In the Divine mind Joseph was the one chosen from amongst all others. Joseph held the first place. Joseph was predestined to this office. True, from the tribe of Juda, from the family of David, great patriarchs were to arise, famous leaders of the people, most noble kings; but God did not choose any of these. He chose Joseph alone. Joseph was the beloved one. Joseph was specially preordained to become one day the happy spouse of Mary and the foster-father of Jesus....
Thus Joseph was, after Mary, comprehended in the very decree of the Incarnation, and, after Mary, was called to have an integral part, as it were, in this ineffable mystery. It is easy to perceive how much honour hence redounds to Joseph; for if, next to the mystery of the Most Holy Trinity, the mystery of the Divine Incarnation is the essential foundation of the Christian faith, who can fail to see that to be included in the eternal decree of so admirable a mystery, into which the angels themselves "desire to look," is an incomparable glory to this great saint? We must always, therefore, bear well in mind this singular destination of Joseph, because this is truly the ground of all his greatness. This is the basis upon which all his glories are raised. Whoever thoroughly realises the fact of this preordination will no longer marvel at God's predilection for Joseph, and at seeing him so highly privileged and exalted to be the guardian and patron of the Universal Church.
~ Excerpt from The Life and Glories of Saint Joseph by Edward Healy Thompson, M.A. ~