Shared ground
Ezekiel is led out through the east-facing gate after the inner temple area has been measured. Then the guide measures the outer edge “all around,” reporting the same large number on each side (east, north, south, west). The effect is a complete, symmetrical boundary: a square perimeter enclosing the sanctuary complex.
The text also states a reason for the enclosing wall: it “makes a separation” between what is holy and what is common (ordinary). That purpose matches the wider vision’s concern that access to God’s space is ordered and protected, not casual or undefined (compare Ezekiel 43:12).
Where interpretation differs (only where needed)
Two main questions are debated.
First, what unit is meant by “five hundred.” Some read the passage as five hundred measuring-reeds on each side (a very large area), while others argue it should be five hundred cubits (a smaller area). The English in this section repeatedly says “reeds,” but readers note that Ezekiel’s temple measurements elsewhere raise questions about consistency.
Second, what is emphasized by the wall: mainly a physical perimeter that controls movement, or mainly a symbolic marker that teaches the difference between holy and ordinary. Many readers see both, but they disagree on which is primary.
Why the disagreement exists
The disagreement about size comes from how ancient measurement terms are handled in different manuscripts and translations, and from how people try to fit these numbers alongside the rest of the vision’s dimensions. The disagreement about purpose comes from the fact that v. 20 gives a theological reason (separation), but does not describe practical features like gates, guards, or penalties.
What this passage clearly contributes
Explicitly, the passage completes the measuring tour by tracing the outermost boundary and presenting it as a four-sided, equal-length enclosure. It also explicitly explains the boundary’s function: maintaining a clear distinction between holy space and common space. Theologically by inference, the vision portrays holiness as something that must be defined in space and protected by limits, not left to informal judgment or shifting custom.