Luke 1:39

For Jesus who was in her womb hastened to sanctify John, still in the womb of his mother. Whence it follows, with haste.

The Angel, when he announced the hidden mysteries to the Virgin, that he might build up her faith by an example, related to her the conception of a barren woman. When Mary heard it, it was not that she disbelieved the oracle, or was uncertain about the messenger, or doubtful of the example, but rejoicing in the fulfilment of her wish, and consicentious in the observance of her duty, she gladly went forth into the hill country. For what could Mary now, filled with God, (plena Deo) but ascend into the higher parts with haste! The grace of the Holy Spirit knows not of slow workings. Learn, ye virgins, not to loiter in the streets, nor mix in public talk.

(Hom. iv. in Matt.) Or else the Virgin kept to herself all those things which have been said, not revealing them to any one, for she did not believe that any credit would be given to her wonderful story; nay, she rather thought she would suffer reproach if she told it, as if wishing to screen her own guilt.

But every soul which has conceived the word of God in the heart, straightway climbs the lofty summits of the virtues by the stairs of love, so as to be able to enter into the city of Juda, (into the citadel of prayer and praise, and abide as it were for three months in it,) to the perfection of faith, hope, and charity.

She went into the mountains, because Zacharias dwelt there. As it follows, To a city of Juda, and entered into the house of Zacharias. Learn, O holy women, the attention which ye ought to show for your kinswomen with child. For Mary, who before dwelt alone in the secret of her chamber, neither virgin modesty caused to shrink from the public gaze, nor the rugged mountains from pursuing her purpose, nor the tediousness of the journey from performing her duty.