For the illustration of the mystery, the Fathers and Theologians employ
various analogies--the emergence of Christ from the sealed tomb, His going
through closed doors, the penetration of the ray of sun through glass,
the birth of the Logos from the bosom of the Father, the going out of
human thought from the human spirit. Christ’s miraculous emergence from
the unimpaired womb of the Virgin Mother finds its ultimate explanation in
the Omnipotence of God.
St. Augustine says “in such things the whole ground of the mystery
is the might of Him who permits it to happen.” (Ep. 137, 2, 8)