Zechariah 3:6-10 The High Priest’s Ministry.
The Angel of the LORD, the pre-incarnate Christ, here admonishes Joshua as he began his new ministry (v. 6). Speaking for the LORD of hosts the Angel tells Joshua that in order to be a judge in the LORD’s house, he must show himself to be one who walks in His ways and keeps His command. This also applies to him having charge in His courts, where the LORD was going to give him “places to walk among those who stand” there (v. 7 Cf. Lev. 8:35; Dt. 17:9-13; Ezek. 44:16). He would not stand alone, but he would be accompanied by his companions, “a wondrous sign,” and they all needed to take heed (v. 8a), because the LORD would be bringing forth His “Servant the BRANCH” (v. 8b Cf. 6:12-13; Is. 4:2; 11:1; 53:2; Jer. 23:5; 33:15). This title combines the offices of priest and king, which is one of the developments occurring more towards the end of the old covenant scriptures, as the time for the Messiah’s appearing approaches (Cf. 6:13).
The Messiah is also often referred to as a stone, in fact the Chief Cornerstone (v. 9a Cf. Ps. 118:22; Eph. 2:20). Upon this stone are seven eyes. Seven is a number symbolizing perfection, and they also represent the all seeing attribute of the LORD of hosts (v. 9b Cf. 4:10). As such, it is an attribute of the Son and Spirit as well (Cf. Rev. 5:6). When it also says that the LORD of hosts would “engrave its inscription,” it possible that this is the inscription on the crown which was placed on top of the turban of the high priest, which inscription read ‘HOLINESS TO THE LORD’ (Cf. Ex. 28:36; 39:30; Ezek. 31:7). In any case, what he was being told here was that the holiness required of him would only be authentic, because the LORD in mercy and by grace had removed “the iniquity of that land in one day” (v. 9c). The invitation to come would therefore be open to all who were forgiven (v. 10 Cf. 2:11; Mic. 4:4). The “one day,” especially in the context of the high priest, may be the Day of Atonement.*
* “God will take away His people’s sin through the BRANCH. The priestly system in the Old Testament was not intended actually to cover sin but only to prefigure the One who would truly deal with man’s sin (Heb. 10:1-18). The Day of Atonement (Lev. 16:30; 23:28) was an annual reminder of sin (Heb. 9:7-10), but Christ on a single day (Good Friday) once for all made atonement for the sins of God’s people (Heb. 9:11-14) (NGSB p.1470).”