The divine happenings surpass the limits of our human mind.
I see here that one should have a strong faith in the Divine Providence, and, when acting in accordance with justice and charity, one should think that all what happens is for its own good, for the final salvation. And can also be for someone else's salvation or safety.

I should never doubt about this, and have to accept whatever God sends, possibly without complaints . 'Omnia in bonum'

Lino Bertuzzi

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Commentary of the day by Saint Augustine (354-430), Bishop of Hippo (North Africa) and Doctor of the Church - 6th Sermon for the Nativity of John the Baptist; no. 293, 1

What will the glory of the judge be, if the glory of the hero is so great? What will he be who comes as the Way (Jn 14:6), if such is the one who prepares the way? ( . . . ) We are celebrating John's birthday, we also celebrate the birthday of Christ . . .  John was born of a woman who was too old for childbearing; Christ was born of a young virgin. John's birth occurred in spite of the age of his parents; Christ's birth occurred without the union of sexes. One was predicted by an angel; the other was conceived by the voice of the angel...The news of John's birth was met with incredulity and his father was struck dumb; Mary believes in Christ's birth and conceives him through faith... 

John, then, appears as the boundary between two covenants, the old and the new. That he is a sort of boundary the Lord himself bears witness when he speaks of the law and prophets lasting until John the Baptist: “The law and the prophets lasted until John” (Lk 16:16). Thus John represents the time that is past and, at the same time, he is the herald of the new era to come. Because he represents the past, he is born of aged parents; as herald of the new era, he is declared to be the prophet while still in his mother's womb (Lk 1:41) . . .  It was revealed that he was to be Christ's precursor even before they had ever seen one another. These are divine happenings surpassing the limits of our human frailty. In due course he is born, he receives his name, his father's tongue is loosened. One must read these events in the light of their deeper symbolic ´meaning.

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Holy Gospel of Jesus Christ according to Saint Luke 1:57-66.
When the time arrived for Elizabeth to have her child she gave birth to a son. Her neighbors and relatives heard that the Lord had shown his great mercy toward her, and they rejoiced with her. When they came on the eighth day to circumcise the child, they were going to call him Zechariah after his father, but his mother said in reply, "No. He will be called John." But they answered her, "There is no one among your relatives who has this name." So they made signs, asking his father what he wished him to be called. He asked for a tablet and wrote, "John is his name," and all were amazed. Immediately his mouth was opened, his tongue freed, and he spoke blessing God. Then fear came upon all their neighbors, and all these matters were discussed throughout the hill country of Judea. All who heard these things took them to heart, saying, "What, then, will this child be?" For surely the hand of the Lord was with him.and he spoke blessing God. 
Then fear came upon all their neighbors, and all these matters were discussed throughout the hill country of Judea. 
All who heard these things took them to heart, saying, "What, then, will this child be?" For surely the hand of the Lord was with him.