"You and I, for the sake of all people, must continue to be outraged," Hayashi told an audience of about three dozen at Salt Lake City's First Unitarian Church. "If we lose that, we will lose the energy to move forward to make the changes that need to be made."
There are more than 300 million guns in the hands of American civilians more than half of all the small arms in the world, Sven Haynes, of the anti gun violence organization Gunsense, told the small gathering.
The $12 billion-a-year firearms industry spends millions annually convincing legislators and the public that using guns is not only a right but a duty, he said.
"All those guns don't make us safer," Haynes said. "All those guns lead to 32,000 deaths annually."
Each of the Sandy Hook victims was hit with at least three bullets, he said.
Since then, there has been no meaningful legislation restricting semi-automatic weapons or enhancing background checks.
Haynes recalled Sandy Hook victim Noah Pozner, 6, who was shot 11 times. His mother, Veronique Pozner, insisted that her son have an open casket, even though his jaw had been blown off. Haynes quoted her, saying, "I owed it to him as his mother," adding she didn't want people to think "these little angels just went to heaven. No. They were butchered."
Photos of each victim were placed around the small chapel. Ron Molen, who lost a son to gun violence, lighted a candle for each one, as their names were called out by the Rev. Tom Goldsmith of the First Unitarian Church.
Twelve members of the International Children's Choir, accompanied by Steve Kocherhans on guitar, performed his original song, "Gone Before Noon":
"Running on a playground, jumping with rope/ Wild imaginations, promises and hopes/ Reaching out to all they knew, inspiration beyond our view/ Here's to their lives, laughter lost too soon/ They came in the morning and were gone before noon."
Goldsmith told the gathering that "it is important that we break away from business as usual ... to remember the loss of these children ... and to remember the sacred gift of life.
"The holidays are less about glitter," he said. "And more about holding each other more closely."
And although only three dozen attended the memorial, Hayashi reminded them that they could make a difference.
"There aren't a lot of us here this morning," the Episcopal bishop said. "I look at that and say, 'Well, Jesus only had 12.' "