"Every day I personally experience the dedication, professionalism and love with which you carry out your activity," he said. "And thank you for this!"
The swearing-in ceremony will follow a full weekend of events, which are attended by representatives of the Swiss army, Swiss government, and Swiss bishops' conference. Family and friends of the guards, and former guards who return for a visit, also participate.
This year's swearing-in schedule includes a concert by a wind orchestra Sunday morning and vespers in the church of Santa Maria della Pieta in the Vatican's Teutonic College.
After vespers will take place the ceremony of the "deposition of the crown," which commemorates the guards who died during the Sack of Rome, followed by a gala dinner.
Before the swearing-in ceremony May 6, the guards will attend Mass with Cardinal Angelo Comastri in St. Peter's Basilica.
At the ceremony, each new recruit approaches the flag of the Swiss Guard when his name is called out. Firmly grasping the banner with his left hand, the new guard raises his right hand and opens three fingers as a sign of his faith in the Holy Trinity.
As he holds up his fingers, the guard proclaims this oath: "I, (name), swear diligently and faithfully to abide by all that has just been read out to me, so grant me God and so help me his saints."
In English, the full oath reads: "I swear I will faithfully, loyally and honorably serve the Supreme Pontiff Francis and his legitimate successors, and also dedicate myself to them with all my strength, sacrificing if necessary also my life to defend them. I assume this same commitment with regard to the Sacred College of Cardinals whenever the see is vacant. Furthermore, I promise to the Commanding Captain and my other superiors respect, fidelity and obedience. This I swear! May God and our Holy Patrons assist me!"
Hannah Brockhaus is Catholic News Agency's senior Rome correspondent. She grew up in Omaha, Nebraska, and has a degree in English from Truman State University in Missouri.