On Sunday, Cardinal Sean O'Malley called on the people of Boston to return to the community.
"It has been refreshing to see the generous and at times heroic response to the Patriot's Day violence. Out challenge is to keep the spirit of community alive," he said.
Pictures of those killed were place on easels inside this cathedral and O'Malley said they live now in eternity.
At a Red Sox game on Saturday, fans filled Fenway Park with their voices, singing "The Star-Spangled Banner" in unison.
They applauded for law enforcement, they mourned the victims of the bombings and they showed their resilient spirit.
"We are one. We are strong. We are Boston. We are Boston strong," the announcer said to an eruption of cheers.
The Red Sox later pulled out a spirit-boosting win.
And America hasn't forgotten about David Henneberry, the man who tipped police off that Tsarnaev was hiding in his boat.
Bullets riddled the blood-stained vessel during a final volley of gunfire between Tsarnaev and law enforcement. Henneberry is being regarded as a hero, and people around the country are sending him checks to put toward a new boat.
Deborah Newberry, 62, of Orlando, Fla., told ABCNews.com she mailed a $25 check to Henneberry's home.
"Just listening to his coolness and how he handled the situation, it was like OK, that is a man who needs to have his boat restored," she said.
ABC News' Pierre Thomas, Anthony Castellano, Aaron Katersky and Christina Ng contributed to this report.