In Mark's Gospel, we read of Christ raising a 12-year-old girl from the dead. He then sternly tells those around Him (Peter, James, John, the parents) not to tell anyone about it.
Here is the surrounding text:
Mark 37, 41-43: "He allowed no one to accompany Him, except Peter and James and John the brother of James..." 41"Taking the child by the hand, He said to her, 'Talitha kum!' (which translated means, 'Little girl, I say to you, get up!'). Immediately the girl got up and began to walk, for she was twelve years old. And immediately they were completely astounded. 43And He gave them strict orders that no one should know about this…"
In this instance, it was (somehow) necessary to do things behind closed doors. All but 3 disciples were allowed to witness it (of course, the same three would see the transfiguration). Why was it so important to keep this miracle a secret: was there something about miracles involving children that required silence — or is there more to it?