ARLINGTON, Va. (AP) — They are a day away from becoming Catholic priests, rehearsing for their ordination Mass under the gothic cathedral’s arches.

It’s a balmy Friday afternoon in June, and they are practicing where to stand, when to kneel. The weekend’s rituals will be the culmination of six years of seminary and a lifetime of discernment.

There are so many of them — more than their diocese has ordained at one time in nearly 30 years — that it’s a challenge to fit the whole group in front of the altar.

Their bishop likes to call them “the 12.” Like the 12 apostles of Jesus, their number has become a mantra and a prayer. It offers hope there can still be joy and renewal in a church riven by division, crises and abuse.

Among the group there are engineers, a tech company founder and two future military chaplains. They range in age from 28 to 56. Most are U.S.-born, but some trace their roots to faraway countries with a strong Catholic presence: Cameroon, Mexico, Peru, Haiti.

They are entering the priesthood at an exciting time, just as the first U.S.-born pope begins his papacy. Yet, there remains an acute shortage of clergy like them. In the U.S., the number of priests has declined by more than 40% since 1970, according to CARA, a research center affiliated with Georgetown University.

During their final year of seminary, these 12 men have served as transitional deacons, offering baptisms, homilies and promising to live in obedience and celibacy. “We’ve already made the promises that are, I guess, ‘the scariest,'” said the Rev. Ricky Malebranche, one of the ordinands.

Soon they will be entrusted with more sacraments. As ordained priests, they will work at parishes around northern Virginia, with the ability to consecrate the Eucharist, hear confessions and anoint the sick.

For now, they shuffle side to side until they can fit in a row. Carefully they lie down to practice the act of prostration — arguably the most dramatic moment during an ordination ceremony. Elbows bent, hands cradling their heads, the men press their faces to the cold, marble floor.

It’s a position of vulnerability that signals absolute surrender.

“We’re laying before the Lord,” the Rev. Mike Sampson, an ordinand, explained before the rehearsal. “We’re laying our lives down.”

Searching for something more

While neighboring dioceses have shuttered parishes and face dire budget shortfalls, the Diocese of Arlington is opening new churches. Its finances are solid.

This year’s class of new priests is the second largest in the diocese’s 50-year history. The reasons behind that success “are a little bit mysterious,” said the Rev. Michael Isenberg, the diocese’s outgoing vocations director.

He points to one factor helping the recruiting pool: vibrant parishes, full of young professionals drawn to jobs around Washington, D.C.

Sampson, 42, was a government lawyer and raised a Protestant before he was baptized as a Catholic in 2013. Six years later, he enrolled in seminary to become a priest.

The Rev. Tim Banach, 31, worked as a consultant in the same office complex as Sampson. “I enjoyed the work I was doing, but there was something more that I desired.”

“I had the dream job,” said the Rev. Alfredo Tuesta, 40, who earned a doctorate in engineering and was working at the U.S. Naval Research Laboratory when he felt called to the priesthood. “I had the job that I had trained many years to achieve — and it wasn’t enough.”