“But what was decreed and constituted in respect to marriage by the authority of God has been more fully and more clearly handed down to us, by tradition and the written Word, through the Apostles, those heralds of the laws of God. To the Apostles, indeed, as our masters, are to be referred the doctrines which "our holy Fathers, the Councils, and the Tradition of the Universal Church have always taught,"[9] namely, that Christ our Lord raised marriage to the dignity of a sacrament; that to husband and wife, guarded and strengthened by the heavenly grace which His merits Rained for them, He gave power to attain holiness in the married state; and that, in a wondrous way, making marriage an example of the mystical union between Himself and His Church, He not only perfected that love which is according to nature, [Trid., sess. xxiv, cap. 1, “De reformatione matrimonii.”] but also made the naturally indivisible union of one man with one woman far more perfect through the bond of heavenly love.”  Pope Leo XIII, Arcanum, February 10, 1880, Par. 9