"There is no doubt that in this conception, a vivifying and incandescent spirit filled each one of Mary's parents with a singular energy and that the protection of holy angels was present." [ 1 ]
These words significantly imply that Joachim and Anna were in the middle of a mysterious intervention on behalf of God, who made them ready to give birth to an exceptional creature, who had in front of her a future fraught with supernatural events. This is shown by the succession of angelic presence around the predestined child.
The Lord wanted therefore that such a creature would appear haloed by a unique splendor, born in admirable purity. "Extraordinary Blessed Virgin, you cannot, concerning your graces merits, be compared to anybody else; you cannot, concerning your chastity, be surpassed by anybody." [ 2 ]
 St Bernard, Sermo VI in Nativitate B.V.M., PL 141, 326 C.
 St Bernard, Sermo VI in Nativitate B.V.M., PL 141, 327 A.
Père Luigi Gambero