Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "G-d be with you. Know that the great-grandson of Or' [?]- gollath will always fail through those who the follow one true G-d." David.

Post-it note with handwritten message in red marker. The message reads: "We are with you." Illustrated with a heart and a Star of David.

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 confirms God's love and urges the reader not to let hate triumph over faith. 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 love, unity, and blessings. The church's contact information is included on the back of the envelope.

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 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: "Tree of Life members, There is a light at the end of the tunnel, you just have to see the light. Margee [last name redacted]."

Rectangular card from a student at Fountain Valley School in Colorado Springs, Co. Front reads: "Dear members of Tree of Life, I'm from Japan and I am writing this letter because on extremely sad news about Jewish people came up yesterday. I'm feeling awfully sorry for Jewish people. I've been learning about 3 monotheistic re[li]gions from last month, so it also made me feel that I have connection with every single Jewish person.

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 is dated October 28, 2018 and reads: "Dear Friends, Peace to you. May you live in the love, joy, and kindness of the God of Abraham, Isaac, and Jacob. God is on the throne, always. Harry [last name redacted]." The church's contact information is included on the back of the envelope.

Typed bilingual Hebrew and English letter from a student at Hebrew Academy, a private Jewish day school in Montreal, Quebec. In English, the letter reads: "Dear Rabbi, I am very sorry for what happened in your shul. I hope everyone that got injured will heal quickly. I hope that it will never happen again. Sincerely, Max [last name redacted] From Hebrew Academy."

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 words of prayer and encouragement. The church's contact information is included on the back of the envelope.

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.

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.

Post-it note with handwritten message in green marker. The note is written in Hebrew. Translated into English, it reads: "There is love with us and it will be victorious. May their memories be a blessing." Signed by the Karmiel-Misgav partnership with Pittsburgh.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Be Strong" and other floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

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: "Dear Tree of Life Synagogue, Brothers and sisters, we love you and are praying for all of you in this difficult time. Love, The Pasha Family."

Handwritten and illustrated card on light blue paper. The card reads: "We love you!" Signed: "Your friend, Bennett." Illustrations of sun, various flowers, and five hearts appear in the center.

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.