Note from a member of The Church at Severn Run in Severn, Maryland. The note reads: "We send LOVE to you today and always. We are on in the eyes of the Lord. When one hurts, we all hurt. When there is joy for one, there is joy for all. Prayers and blessings to you."

Hand painted card. The card contains the Stronger Than Hate symbol with a yellow Star of David on the left. The words: "Stronger than Hate" appear in a black text box to the right. A heart appears above.

Letter dated 10/30/18 from a student at the Hadar Institute, an egalitarian Yeshiva and center for Jewish life located in the Upper West Side of Manhattan.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/18 and reads: "To the families and friends of Tree of Life Synagogue: Please be comforted by the prayers for your losses- offered up by believers of many faiths. Only God can know why this tragedy occurred, but know that He will hold you in his loving arms to heal you with his abiding love and faithfulness. The prayer quilt is tired with countless prayers as well. Be comforted when you see it.

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. The inside reads: "Dear Tree of Life, I'm sorry for your loss. Hope everything goes well. From Bella [last name redacted]."

Black and white photograph showing the original section of the Tree of Life synagogue located at the corner of Wilkins Avenue and Shady Avenue in Squirrel Hill.

Post-it note with handwritten message in black marker. The message reads: "With you in strength and heartbreak and love that remembers all that you are."

Post-it note with handwritten message in black marker. The message reads: "May god be with you. Cierra [last name redacted]. Pittsburgh, PA."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Please know that our thoughts and prayers are with you and your congregation during this most difficult time. We here in San Diego pray for your healing. Jeanie."

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 affirms the sender's belief that we are all God's children. The church's contact information is included on the back of the envelope.

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 contains messages of peace, love, and unity. The church's contact information is included on the back of the envelope.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated Nov. 4, 2018 and reads: "To the beautiful Tree of Life community in Pittsburgh from a Presbyterian in San Diego: Shalom... May your deepest sorrows be comforted by God's soothing peace. May you feel the support of others around the world. Imagine me, a teacher named Carolyn V., carrying 2 buckets to hold your tears and mine as I grieve with you. Never let evil win. LOVE WILL TRIUMPH. Love from C. [last name redacted] [heart symbol]."

Notecard with a large heart illustrated in red crayon. Signed: Shani [last name redacted], Philadelphia."

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. The inside contains an illustrated tree surrounded by hearts. The tree is labeled "Tree of Life" on the branches and "Synagogue" below. The card reads: "Tree of Life, I am so sorry for your loss. We will pray and keep you in our thoughts and prayers. We will continue to pray for you at the nights come. Have a great day! Love, Natalie T. Holy Angels CCD, 6th grade."

Card with a peacock on the front cover. The card reads: "A Catholic who loves all Jewish people! A friend, a neighbor, she loves you."

Card from the Friendship Circle of Illinois. The front cover reads: "To: The Jewish Community of Pittsburgh. From: Yisroel [last name redacted], Chicago IL." The inside reads: "I feel so sad for you. My hachlata (resolution) is to give 3 cents instead of 1 or 2 cents. You should have everything you need. And Hashem (God) should give you all that you need." Spelling errors have been corrected for clarity.

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.

Folded card with colored pencil illustration. Front shows a tree in autumn with grass and falling leaves. Inside reads: "Nobody deserves to go through what you are going through. Best wishes to all. Love [heart] Beth Chai."