1 Psa 99:1-9. God's government is especially exercised in and for His Church, which should praise Him for His gracious dealings.
sitteth ... cherubim - (compare 1Sa 4:4; Psa 80:1).
tremble ... be moved - inspired with fear by His judgments on the wicked.

2 great in Zion - where He dwells (Psa 9:11).

3 thy ... name - perfections of justice, power, etc.
great and terrible name - producing dread (Deu 10:17), and to be praised by those over whom He is exalted (Psa 97:9).
it is holy - or, "He is holy" (Psa 99:5, Psa 99:9; Isa 6:3).

4 To His wise and righteous government all nations should render honor.
king's ... judgment - His power is combined with justice.
he is holy - (compare Psa 22:3).

6 The experience of these servants of God is cited for encouragement.
among ... priests, among ... upon the Lord [and] He spake ... pillar - may be referred to all three (compare Exo 18:19; Lev 8:15; Deu 5:5; 1Sa 9:13).

7 cloudy pillar - the medium of divine intercourse (Exo 33:9; Num 12:5). Obedience was united with worship. God answered them as intercessors for the people, who, though forgiven, were yet chastened (Exo 32:10, Exo 32:34).