Yesterday’s attacks were all the more frightening because they did not require sophisticated technology, only knives and organization. They are frightening because of the inhumanity of those who made airplanes bearing scores of passengers into weapons and because of the attacks’ seemingly random and inexplicable nature. These actions of unnamed terrorists—for as of yet no known political cause, for no end but violence—were intended to inspire fear in all human beings who only wish to live their lives in peace.

We hope that those who chose to take so many lives will be brought to swift justice, and that our government takes effective measures to restore Americans’ sense of safety.

But there will be time enough for such efforts in the coming days. For now, the most important work must be done by individual Americans. Emergency crews, the National Guard, medical professionals and selfless volunteers are already donating their services and risking their lives to save as many Americans as they can.

In return, we must pledge our support and show our solidarity with these brave men and women. The demand for emergency rescue and relief is certain to continue for weeks, if not months. When the president addressed the nation last night, he said that this attack is a test, and it is a test that we all must resolve to pass, together.

In the face of this tragedy, we must devote ourselves to mourning the dead, treating the wounded and comforting the bereaved—secure in the knowledge that we as a peaceful society are stronger than those who would threaten our freedom.