The answer is: Flaming sword

Gen 3:24

In Genesis 3:24, we see the imagery of divine protection unfold, where God sets up cherubim and a flaming sword to guard access to the Tree of Life. This remarkable scene resonates with profound symbolism and meaning. The cherubim are not just any celestial beings; they serve as majestic guardians, often associated with the presence of God throughout the Scriptures. You might recall that in Exodus, the arcs of the covenant featured golden cherubim, emphasizing their role in safeguarding sacred spaces.

The flaming sword represents a barrier—most notably, a figurative alarm to ensure that humanity couldn’t return to a state of innocence after the decision to eat from the Tree of Knowledge. How striking it is to think that a once open heaven now needed protection! This sword also mirrors the idea of destruction in judgment, a theme echoed later in Biblical stories when God intervenes to protect or correct humanity's path.

Fun trivia: the image of a sword blazing isn't exclusive to this passage. Throughout the Bible, especially in prophetic books like Revelation, swords often portray divine authority, righteousness, and at times, judgment. Moreover, the Tree of Life, which could once be freely accessed, becomes a beautiful and central theme in the Christian narrative that leads to the new Jerusalem—where access to life is restored and exalted! It’s a poetic craft spinning a narrative tapestry of loss, judgment, hope, and reunion.