Albert Barnes Commentary Zechariah 3:7

"Thus saith Jehovah of hosts: If thou wilt walk in my ways, and if thou wilt keep my charge, then thou also shalt judge my house, and shalt also keep my courts, and I will give thee a place of access among these that stand by." — Zechariah 3:7 (ASV)

If thou wilt walk in My ways and if thou wilt keep My charge – Both of these are expressions, dating from the Pentateuch, for holding on in the way of life, well-pleasing to God and keeping the charge given by God. It was the injunction of the dying David to Solomon, Keep the charge of the Lord thy God, to walk in His ways, to keep His statutes... (1 Kings 2:3).

Then shalt thou also judge My house – Judgment, in the place of God, was part of the high priest’s office (Deuteronomy 17:9–13; Deuteronomy 19:17; Malachi 2:7). Yet these judgments also were given in the house of God. The cause was directed to be brought to God, and He through His priests judged it. Both these aspects, then, may be understood from this term: the oversight of the people itself, and the judgment of all causes brought to it. Jonathan: “Thou shalt judge those who minister in the house of My sanctuary.”

And I will give thee place to walk among those who stand by – that is, among the ministering spirits, who were standing before the Angel of the Lord (Zechariah 3:4). This can be fully realized only after death, when the saints will be received among the several choirs of angels. Jonathan: “In the resurrection of the dead I will revive thee and give thee feet walking among these Seraphim.” Even in this, since our conversation is in heaven (Philippians 3:20), and the life of priests should be an angel-life, it may mean that he should have free access to God, his soul in heaven, while his body was on this earth.