Receiving a prophetic vision of the future Temple requires total concentration and the engagement of all the senses. God commands the prophet to focus his mind, his sight, and his hearing to grasp a complex system of rules regarding who may enter the sacred grounds and how they must do so. The specific order of God's instructions, directing the prophet to first understand with his mind and only then to use his eyes and ears, is deeply significant. When absorbing spiritual laws, intellectual comprehension must come before sensory observation. This is a shift from earlier prophetic visions that dealt merely with the physical structure of the building, which naturally required seeing first [מלבי״ם]. Now, the requirement is to first achieve a true, accurate understanding [מצודת דוד]. Once this mental foundation is set, the prophet is told to look closely to observe the precise measurements of the space [מצודת דוד].
The prophet must pay careful attention to the statutes that define the proper use of every single room. He must also absorb the laws that dictate exactly where the priests and the people are permitted to stand [ביאור שטיינזלץ, מצודת דוד]. A major focus of this vision is the careful regulation of the Temple's entryways and exits [ביאור שטיינזלץ]. The primary approach among commentators is that this highlights the strict supervision required over anyone seeking to enter. Even when the gates are wide open, access is not granted to just anyone. Only those who are worthy and pure may step inside, and even they are restricted to specific areas based on the varying levels of holiness found throughout the complex [רד״ק, אברבנאל].
This intense focus on the entryways directly continues the earlier vision of the closed gate, reinforcing the idea that in the future, the unworthy will be permanently kept away from the Temple [מלבי״ם]. Furthermore, understanding these entryways involves learning the exact physical paths people are allowed to walk. For example, entry through the small southern gate is forbidden, while the northern gate serves as the proper entrance for both the Messiah King and the general public [מצודת דוד].