The concept of the "Sealing of Prophecy" refers to the divine act of closing or completing a prophetic message, often indicating that the prophecy is not to be altered or that its fulfillment is reserved for a future time. This theme is present in several biblical passages and is significant in understanding the nature and purpose of prophecy within the biblical narrative.

Daniel 12:4, 9
In the Book of Daniel, the sealing of prophecy is explicitly mentioned. Daniel 12:4 states, "But you, Daniel, shut up these words and seal the book until the time of the end. Many will roam to and fro, and knowledge will increase." Here, the sealing signifies that the full understanding of the prophecy is reserved for a future time, often interpreted as the end times. Similarly, in Daniel 12:9, the angel tells Daniel, "Go on your way, Daniel, for the words are closed up and sealed until the time of the end." This indicates that the prophecy is complete and will remain unaltered until its appointed time of revelation.

Revelation 5:1-5
The Book of Revelation also presents the theme of sealed prophecy. In Revelation 5:1-5, John describes a scroll with seven seals in the right hand of Him who sits on the throne. The scroll represents God's comprehensive plan for history and redemption, and only the Lamb, Jesus Christ, is found worthy to open the seals. This imagery underscores the authority and sovereignty of Christ in revealing and fulfilling divine prophecy.

Isaiah 8:16
Isaiah 8:16 provides another instance of sealing, where it is written, "Bind up the testimony and seal the law among my disciples." This passage suggests the preservation and protection of God's word among His followers, ensuring its integrity and eventual revelation to those who are faithful.

Ezekiel 28:12
In Ezekiel 28:12, the phrase "You were the seal of perfection, full of wisdom and perfect in beauty" is used metaphorically to describe the king of Tyre. While not directly related to the sealing of prophecy, it illustrates the concept of sealing as a mark of completeness and authority.

Purpose and Implications
The sealing of prophecy serves several purposes within the biblical context. It emphasizes the authority and finality of God's word, ensuring that His plans are unaltered by human intervention. It also highlights the eschatological aspect of prophecy, pointing to a future fulfillment that is often associated with the end times. The sealed prophecies are a testament to God's sovereignty, as He alone determines the timing and manner of their revelation and fulfillment.

Interpretation and Application
From a conservative Christian perspective, the sealing of prophecy is a reminder of the trustworthiness and inerrancy of Scripture. Believers are encouraged to study and meditate on these prophecies, recognizing that their full understanding may be reserved for God's appointed time. The sealed prophecies also serve as a call to faithfulness, as they assure believers of God's ultimate plan and purpose in history.

In summary, the sealing of prophecy is a significant biblical theme that underscores the divine authority, preservation, and future fulfillment of God's word. It invites believers to trust in God's sovereign plan and to remain steadfast in their faith as they await the unfolding of His promises.