Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The envelope features an illustrated heart. The front cover reads: "Peace" and features a sandy landscape with a blue sky and orange flowers. The inside reads: "May you find peace in God's love; and be able to go forward and heal in his Glory. Ann [last name redacted] St. Peters Episcopal Church Londonderry, NH."

Folded card with repeating diagonal plaid pattern in green and dark blue marker on yellow paper. The inside contains the following words in a cloud-shaped bubble with emanating light rays: "I am sorry for what happened. It will be ok. [Heart]." A Star of David surrounded by tiny dots appears in the upper left corner.

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.

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 God's support and contains prayers for the families and community. 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 11/4/18 and reads: "Dear All, Our hearts are crying with you. We feel you[r] pain. We pray you can worship in your house and feel safe. With Halloween just passing, I am reminded of skeletons and the fact they all look the same. We can't tell someone's faith, color, etc. We are all the same- people of God. Point Loma Community Presbyterian Church is with you, supports you, cares for you. Mary [last name redacted] Elementary School Teacher."

Page of blank stationery. Blue printing on white paper. Header features illustration of New Light Congregation synagogue. Left-hand margin lists officers of the congregation and contact information for the congregation.

Post-it note with handwritten message in blue marker. The message reads: "Stronger Than Hate. Rachel [last name redacted]." A Star of David appears in the lower left corner.

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: "Dear friends: Praying for God's perfect peace and be with you and comfort you in this time of sorrow. Sincerely, Bob [last name redacted]. P.S. Even in this sadness, I believe God will bring good." The church's contact information is included on the back of the envelope.

Post-it note with handwritten message in green marker. The message reads: "Live for those we have lost. Be well. Love from Boston MA."

Card with colored pencil and marker illustration. When opened, the card shows a tree in the center with a cross on top of a yellow circle in the center left. It is inscribed with the following message: "The tree of life where more life can come to be bet[t]er" and is signed "Samuel [last name redacted]. Risd TX."

Floral tag from floral arrangement sent by the Orange County Islamic Foundation in Mission Viejo, California. The tag reads: "The Orange County Islamic Foundation in Mission Viejo, California extends its sincere condolences and prayers to your congregation. We join you and support you in your moment of grief." The message is printed on a tag from a local florist.

Card with photograph of flower. Handwritten text on front of envelope reads, "To: Tree of Life in sympathy and solidarity" and back of enveloped reads, "Won't you be my neighbor? Mr. Rogers." Handwritten interior of card expresses love for the Pittsburgh Jewish community and evokes Mr. Roger's: "We are called upon to remember the spirit of Mr. Rogers and love each and every one of our neighbors who make our community so wonderful."

Post-it note with handwritten message in blue ink. The message reads: "We love you. You are all so strong." Signed with a heart. Color bleeding due to exposure to the elements at the Wilkins memorial.

Folded card with handwritten messages on white paper. The front cover reads: "Love," written in colorful bubble letters. The inside reads: "Your brothers and sisters in Aspinwall love you very much."

Rectangular card from a student at Fountain Valley School in Colorado Springs, Co. The card reads: "Dear members of Tree of Life synagogue, I'm from Vietnam and I stand with you. I'm sorry for your loss. May peace be with you. Shalom [signature]." Illustrated with Vietnamese flag, peace sign, and Star of David.

Card addressed to Richard Gottfried. Cover features a reproduction of a painting by Frank Crosby, a resident of the Emmaus Community of Pittsburgh. The inside contains messages of love and support written by other members of the Emmaus Community.

Note from a member of The Church at Severn Run in Severn, Maryland. The note reads: "May God bring you peace and blanket you with His love during this difficult time."

Post-it note with handwritten message in red marker. The message reads: "We will love you forever." Creasing due to exposure to the elements at the Wilkins memorial.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "To our Brothers and Sisters at Tree of Life Synagogue, First off, my heart is saddened by the unspeakable tragedy that visited your community last week. My (one) heart breaks with you and we mourn beside you. Second, I feel anger that this could happen. Anger that anyone who have so much fear and brokenness in them that they could commit this kind of act. Finally, and most profoundly, I feel a sense of hope!