Here's an email we received from a senior missionary who is serving in the office of John Gregory's mission. It was very kind of her to share this moment with us.
Hello Bro. and Sis. Sierra,
Today I had the great privilege of accompanying Elder Sierra on piano while he sang I Wonder As I Wonder for 4 zones of wonderful missionaries in the "Mormon Center", a chapel next to the Temple utilized for special occasions. The missionaries attended the Temple as part of this special day.
Elder Sierra's song was the last musical number on the program, just before the prayer. First there were a variety of musical presentations, the reading of the Christmas story from the scriptures with missionaries in beautiful costumes, short Christmas videos, and talks by missionaries and Pres. & Sis. Lewis.
Before he sang, Elder Sierra spoke to the missionaries about imagining themselves in the place of the person singing the message, promised them they would be blessed for doing so. Then he sang to a captive group of missionaries, many of whom had tears in their eyes and on their faces before he finished. It was a sacred moment for us all.
All is well in Zion for one more day. That young man shows a lot of promise ahead of him.