If we go back to the earliest writings of the Church, and quickly examine some sources, we see the “marital and spousal” aspect of this mystical language used in a second century AD document called the Odes of Solomon; and as we proceed up through history we see mention of it in the writings of St. Augustine (4th century), St. Ildephonsus, archbishop of Toledo, Spain (7th century), St. Germanus, patriarch of Constantinople (7th century), Cardinal St. Peter Damian (11th century), St. Bonaventure (13th century), Emmanuel d’Alzon (19th century), and, in the many scholars of the 20th century, such as Cardinal Joseph Suenens, Karl Rahner, Pope John Paul 2, Rev. Peter Damian M. Fehlner, F.F.I., and Pope Benedict 16th.
A few examples of how the word “spouse” is used in these theological contexts may be helpful. In 1979, on Pope John Paul 2 first pilgrimage to the United States, he gave a sermon on our Blessed Mother at the National Shrine of the Immaculate Conception and made this point in relation to Mary:
“…Through her, the Sun of Justice was to rise in the world. Through her, the great healer of humanity, the reconciler of hearts and consciences, her Son, the God-Man, Jesus Christ, was to transform the human condition and by his death and resurrection, uplift the entire human family. As a great sign that appeared in the heavens, in the fullness of time, this woman dominates all history as the Virgin Mother of the Son, as the Spouse of the Holy Spirit, and as the Handmaid of humanity.”
(excerpted from Mary’s Yes – Meditations on Mary Through The Ages, edited by John Rotelle, O.S.A., Servant Press, Ann Arbor, 1988 )