The ultimate completion of redemption extends far beyond the restoration of a single nation. It reaches its peak when the entire world recognizes the unique bond between God and Israel. This global awareness is sparked by a permanent, undeniable reality visible to all. The primary approach among commentators highlights a clear chain of cause and effect. The nations of the world will realize that God has separated and sanctified Israel to be His people. The absolute proof of this special status will be the physical presence of the Temple, standing permanently among them [מצודת דוד, צאינה וראינה].
This future era will be marked by profound national unity. The people will be united under the guidance of a single king, whose leadership will establish the kingdom of heaven on earth [ביאור שטיינזלץ].
There is an even deeper meaning behind the eternal nature of this future Temple. A fundamental principle is that anything God does directly will last forever. The future redemption will be brought about by God Himself, rather than through any human messenger. Therefore, when the nations witness the Third Temple standing eternally, they will understand that this final redemption and state of holiness came straight from Him. Because it is a direct act of God, it is permanent, ensuring that no further subjugation will ever follow [אדרת אליהו].