"Receive into the arms of your mercy the children and the adults who were killed yesterday," Eaton added during prayer.
From church pews to street corners, people joined together on Saturday.
"The fact that we're here together now, it feels better to me than sitting and crying in front of the television set," said Jeannie Hartley, who came to a candlelight vigil Saturday night in front of Denver's Woodbury Library.
"These people, they lost 20 of their children," Hartley added, her eyes welling up with tears.
Mike Salisbury is a father who felt compelled to attend the candlelight vigil, as well.
"I don't have the answers, but I think that something needs to change. And whether that's better mental health services, whether it's different gun laws, I don't know what the answers are. But something needs to happen," Salisbury said.
They all stood together on Saturday night, sharing grief and promoting that message.
"There's just a common denominator of wanting to be with other people that are feeling this indescribable level of grief," Hartley said.
(Copyright 2012 by The Associated Press. All Rights Reserved.)