Seal

A seal is a mark impressed into clay, wax, or metal that authenticates a document, secures it against tampering, and identifies the authority behind it; Scripture uses the image both for physical seals and for the act of sealing someone or something. In the ancient Near Eastern and Greco-Roman world, this is established historical fact: stamp and cylinder seals were pressed into clay bullae or wax to close scrolls, certify ownership, and mark slaves or goods as belonging to a master. The word carries that double sense throughout the Bible — authentication and protection — and it is applied to covenants, prophecies, tombs, and people.

Several passages use the word in its ordinary, concrete sense. In Nehemiah 9:38 the leaders of the returned community seal a written covenant, making it binding and publicly attested. Daniel 12:9 speaks of words "shut up and sealed until the time of the end," where the seal means the prophecy is reserved and not yet opened. Matthew 27:66 describes the stone of the tomb being sealed along with a guard posted, an official measure to secure it. Revelation 5:1 pictures a scroll "sealed shut with seven seals," a document whose contents only a worthy figure may open.

Other passages use sealing figuratively, and this is where the term carries most of its theological weight. John 6:27 says the Father "has sealed" the Son, language of authentication and commissioning. Romans 4:11 calls circumcision "a seal of the righteousness of the faith" Abraham had, joining a physical sign to the reality it attests. 2 Corinthians 1:22 and Ephesians 1:13 and 4:30 speak of believers being sealed by God with the Holy Spirit, and the Greek word rendered "down payment" in 2 Corinthians 1:22 is a commercial term for a pledge or first installment guaranteeing a fuller payment to come. Second Timothy 2:19 treats the seal as an inscription on a foundation, naming God's knowledge of those who are his, and Revelation 7:3–4 describes servants of God sealed on their foreheads — evidently a mark of protection — numbering 144,000 out of the tribes of Israel.

Christian traditions read this material differently. Sacramental traditions, including Catholic, Orthodox, and some Anglican and Lutheran teaching, connect the sealing of the Spirit in Ephesians 1:13 and 4:30 with baptism and with anointing or chrismation, and speak of the seal as an abiding character given in those rites. Reformed and evangelical readings generally treat the sealing as the Spirit's inward work of assurance and preservation, sometimes distinguishing it sharply from any physical ceremony, though Reformed theology has also called baptism a seal of the covenant promise, following the pattern of Romans 4:11. Interpreters also divide over Revelation 7, where some expect a literal 144,000 and others read the number as a symbolic figure for the whole people of God; the sealing itself is variously understood as protection during tribulation or as the church's preservation until the end.

AI-generated reference entry, grounded in the passages where this term appears — history and Scripture stated as such, interpretation labeled as interpretation. Not a substitute for the text itself.