Laminated printed sign in blue and red ink on white paper. The sign reads: "Only love can conquer hate."

Card with polka dots on the cover. The card is addressed "Neighbors" and affirms the three senders' thoughts and prayers for the "victims, family members, and friends at Tree of Life."

Handwritten card in pencil on paper. The front cover features a Star of David in the center and reads in Hebrew: "L'chaim" (to life). The inside reads: "My condolences for this tragedy. Sending love from Cleveland, Ohio. Stay strong. You are in my prayers. Love, Louis [last name redacted]."

Post-it note with handwritten message in blue marker. The message reads: "Stay strong [underlined]. If we work together hate can't win! [Heart]. [Heart] Pittsburgh [Heart]. - Stella K."

Folded card with marker illustration. Cover features illustration of tree with ladder. Interior reads, "We are with you at this sorrowful time. The Beth Chai Congregation of Greater Washington." Back cover reads "I hope you feel better. P.S. We will donate $ to you" with two five-pointed stars.

Handout on grief, trauma, and critical incident stress debriefing, which was sent with the materials from Emergency Ministry Services, a faith-based training and disaster response NGO in San Juan Capistrano, Ca., affiliated with the Orange County Church on the Rock.

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of seven children holding hands around a table with a large goblet and loaf of braided bread, and seven doves. The illustration is labeled: "We are people of God's peace." The inside reads: "May God keep our men and women safe! We are praying 4 u!!!"

Post-it note with handwritten message in blue ink. The message reads: "Find strength in community today and hope for a better tomorrow." A heart appears between the third and fourth line on the right.

Glass, blue stone and blue handwritten post-it-note. The post-it-note reads: "God help these families and community. 'Hitherto hath the Lord helped us.' (1 Samuel 7:12). Raise an Ebenezer in Pittsburgh. RIP 11 lovely souls." The back reads: "The Ebenezer is the stone of help."

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark.

Post-it note with handwritten message in black marker. The message reads: "Love is stronger than hate."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dearest Member of the Tree of Life Synagogue- We are so saddened by the tragic events of the past week. We have so many prayers and concerns for your congregation and your families. We hope that the country will feel your sorrow and hope that people all over the world will bless you. I am part of the prayer quilt ministry that provides quilts for those in need of prayer. We never know who the quilts are intended for as we sew them. But God knows.

Handwritten letter from a student at Hebrew Academy, a private Jewish day school in Montreal, Quebec. The letter reads: "Dear Rabbi, I am so sorry for your loss. I hope it does not happen again. Refua Shleima (speedy recovery). I hope that everyone is comfortable and safe. Ahava Montreal ha [Hebrew Academy] 4A.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear Brothers and Sisters, May God give you strength and courage to overcome this tragedy and bring even more conviction and purpose to the Tree of Life congregation. [First name illegible, last name redacted]."

Card addressed to the victims of the October 27 attack and their families. Writer expresses belief that people in Pittsburgh would have died to protect victims from harm.

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The envelope contains the following handwritten message: "Peace and Comfort." The front cover reads: "LOVE." The inside reads: "Dear Family in God, There are not any adequate words to express the horror of what happened to you in your synagogue. May the love of God and those near and far begin to heal the hurt of your losses. Our heartfelt love and prayers are with you in fellowship. Peace and comfort to you.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside reads: "We are with you, our brothers and sisters. Stand strong within your faith- unyielding, unshakeable. Do not despair." The church's contact information is included on the back of the envelope.