Of the increase of His government and peace
There will be no end,
Upon the throne of David and over His kingdom,
To order it and establish it with judgment and justice
From that time forward, even forever.
The zeal of the LORD of hosts will perform this.
The word picture behind zeal is: breathing in the breath of God's divine revelation and light; the perfect judgements of the Kingdom.
John 16:13 “However, when He, the Spirit of truth, has come, He will guide you into all truth; for He will not speak on His own authority, but whatever He hears He will speak; and He will tell you things to come.
Is it possible that He who is the Spirit of truth is also the Spirit of zeal?
Romans 12:11(ESV) Do not be slothful in zeal, be fervent in spirit, serve the Lord.
Ephesians 5:18 (CSB) And don’t get drunk with wine, which leads to reckless living, but be filled by the Spirit: