ROCHESTER, N.H. (AP) -- Slain U.S. journalist James Foley was living his faith by bringing images to the world of people suffering from war and oppressive regimes, Bishop Peter Libasci said Sunday at a Mass in his honor.

Bishop Libasci said even after Foley was captured for the first time in Libya in 2011, he "went back again that we might open our eyes."

The Mass was attended by Foley's parents, John and Diane Foley, and hundreds of others in their hometown of Rochester, N.H. Afterward, Bishop Libasci read aloud a letter from the Vatican extending the condolences of Pope Francis.

"Thank you for loving Jim," Diane Foley told the crowd after the Mass.

The crowd filled every pew and people stood three deep at the back of the church and along both sides of it. Gov. Maggie Hassan, along with U.S. Sens. Jeanne Shaheen and Kelly Ayotte, attended the Mass.

Foley was kidnapped on Thanksgiving Day 2012 while covering the Syrian uprising. The Islamic State group posted a Web video Aug. 19 showing his killing and said it was in retaliation for U.S. airstrikes in northern Iraq.

Bishop Libasci invoked the prayer of St. Francis, which begins, "Lord, make me an instrument of your peace," to implore the gathered not to hate but to heal.

"It is in giving that we receive," he recited. "It is in pardoning that we are pardoned. It is in dying that we are born to eternal life. To these words, I think we can say, 'Yes, I wish we could do that.' It is not beyond our capability. It is not impossible. Our Lord lived it. Our most Blessed Mother lived it. Many saints have lived it. James lived it."

In a packed Our Lady of the Holy Rosary Church, the bishop frequently addressed Foley's parents and stressed their son's connection to family. He also prayed for another captive journalist, Steven Sotloff, and all captives.

Bishop Libasci said after the Mass that people shouldn't think of vengeance.

"Look at what it's done already," he said. "Look at the heartbreak."

A funeral for Foley will be Oct. 18, what would have been his 41st birthday.

Foley's parents on Aug. 24 released a letter that they say their son wrote while in captivity, which he asked an unidentified fellow hostage who was about to be freed to memorize and recount to his family so the letter would not be confiscated by his captors.

In the letter, posted on a Facebook page called "Find James Foley," Foley described being held with 17 other hostages and passing time by discussing movies, sports and trivia and playing games made up of scraps found in their jail cell. He said the hostages were fed daily and given tea and occasionally coffee.

At a vigil on the night of Aug. 23 in Rochester, about 200 people gathered to show support for the Foley family.

"We are honored that you care and love Jim. We are honored that you recognized the sacrifices he made," John Foley said then. "He loved the Syrian people. He was devoted to telling their story and doing whatever he could to help their fight."

The world's largest bloc of Islamic nations denounced Foley's "heinous" killing and reiterated its support for international efforts to confront the Islamic State fighters.

Iyad Madani, chief of the Organization of Islamic Cooperation, said in a statement Aug. 23 that the actions of the Islamic State group have nothing to do with the values of Islam or his organization's founding principles of tolerance and co-existence.