By Jessica Ravitz, CNN

In a courtroom in Utah this week, Elizabeth Smart revisited the darkest days of her life's journey. But her testimony came during a short break from a spiritual journey - one that has shielded her from reminders of her abduction, the nine-month ordeal and the attention that's followed her.

For more than a year, Smart, who recently turned 23, has been in the midst of her LDS Church mission, a rite of passage hallowed by members of The Church of Jesus Christ of Latter-day Saints.

Serving in Paris, France, she is among the 52,000 Mormon missionaries - most of them young adults; the others retired couples - who are knocking on doors and speaking 107 different languages in 180 countries, according to Lyman Kirkland, a church spokesman.

Those overseeing Smart’s mission didn’t return a call to CNN to discuss her missionary work. But if her time in the field is typical, here’s a glimpse into how she’s been living.

She’s been cut off from television, barred from seeing movies and prohibited from following the news. The only music she hears is church-approved. She wakes at 6:30 a.m. everyday to study the gospel by herself and with another young woman missionary known as her companion.

Barring the one day a week when she and her companion can do laundry, run errands, write letters home and, time permitting, go sightseeing, Smart’s days are spent with her Book of Mormon in hand, reaching out to strangers and teaching those who will listen.

Sharing the LDS Church doctrine, and being of service to people they meet along the way, is a cornerstone of Mormonism. By teaching the gospel and baptizing others, the homegrown U.S. religion has grown to about 14 million members worldwide since it was founded 1830, Kirkland says.

Joseph Smith Jr. established the Christian church after translating the Book of Mormon from golden plates that he said the angel Moroni revealed to him in New York State. In its first year, 16 missionaries were called to serve the fledgling faith, church records show.

From an early age, Mormon children are taught to sing “I Hope They Call Me on a Mission.” To be called on a mission is considered the greatest of honors.

Starting at 19, young men (referred to as elders) may be called to serve two-year missions. Young women (sisters), starting at 21, serve for 18 months. And wherever they go, they travel in same-sex pairs.

A missionary does not choose where he or she will serve.

The would-be missionary completes an application, which is then sent with other materials to LDS Church headquarters by that missionary’s stake president. A stake is sort of like a diocese; it’s the church body that oversees a group of LDS Church congregations, referred to as wards.

At LDS Church headquarters, members of the Quorum of Twelve Apostles pray for divine inspiration before making mission assignments. In April of this year, Ronald Rasband, a general authority in the church, spoke about once witnessing the process when he addressed Mormons at a semiannual conference.

On one large computer screen, photographs of would-be missionaries appeared, he said. Another screen showed areas of the world where the LDS Church has missions. Before doing anything, the apostle knelt in prayer. He would envision where the missionary might go and study medical records, comments from the stake presidents and bishops, and any other materials submitted.

“Finally, as he was prompted by the Spirit, he would assign the missionary to his or her field of labor,” Rasband said. “This general method is typical each week as Apostles of the Lord assign scores of missionaries to serve throughout the world.”

The young adult finds out where he or she is going in a “mission call letter.” The call could take a missionary to places as various as Bolivia, Uganda or Kentucky.

Smart received her mission call letter, which sent her to Paris, France, in September 2009, according to the church-owned newspaper Deseret News.

Standing before family and friends, as most soon-to-be missionaries do, Smart opened her call letter, her father Ed Smart told the newspaper.

“She starts screaming and we’re wondering, ‘Where is it?’ And then she starts reading it,” the paper reported him saying. “We’re thrilled. It couldn’t be better. … It’s away from all this. Some of the celebrity type issues won’t be there. We couldn’t be happier for her.”

The newspaper also reported that during her captivity Smart was forced to write in a diary each night, and at the bottom of each page she would write messages in French that her captors couldn't read.

Last fall's competency hearing for the man accused of abducting Smart, Brian David Mitchell, was scheduled to allow her testimony in court before she began her mission. She returned temporarily from her mission to testify further in Mitchell's federal trial on charges of kidnapping and taking a minor across state lines for sex.

Before leaving for their destinations, missionaries report to one of the church’s missionary training centers. There they engage in spiritual study and, depending on where they’ll be traveling, intensive language classes for up to eight weeks.

New arrivals, dressed to proselytize in suits or modest skirts and always wearing name badges, are partnered up with companions who are further along in their missions. Under the guidance of mission presidents, stationed in the field, these young Latter-day Saints set out to serve.

The mission presidents and their wives act as surrogate parents to the missionaries, and local LDS Church families look out for them, too, often hosting them for meals.

Smart, like other missionaries, has in many respects been cut off from the wider world. A typical missionary is only allowed two calls home a year - on Mother’s Day and Christmas Day. In extenuating circumstances, perhaps like Smart's, exceptions are made. The church could not verify how much phone contact she’s had with her family.

But the odds are she has not followed the ins-and-outs leading up to Mitchell’s trial. Her commitment is elsewhere.