The Pulpit Commentary
The Lord reigneth (see the comment on Psa_93:1). Let the people tremble; literally, the peoples; i.e. all the nations upon earth. He sitteth between the cherubim; rather, he hath his seat upon the cherubim (comp. Psa_80:2). The imagery is taken from the internal economy of the Jewish temple, where the Shechinah was enthroned above the cherubic forms that overshadowed and guarded the ark. Let the earth be moved; or, quake (comp. Psa_114:7).

The Pulpit Commentary
The Lord is great in Zion. Primarily great among his faithful ones, among whom his greatness is especially shown. And he is high above all the people (or rather, peoples). Secondarily great, or "high," among the nations which do not acknowledge him, but are forced to tremble before him (see Psa_99:1).

The Pulpit Commentary
Let them praise thy great and terrible Name. Even the Gentiles, after conversion, will praise the Lord, sing of him, and bless his Name. (On the "greatness" and "terribleness" of God, see Exo_15:11; Deu_7:21; Deu_10:17; Neh_1:5; Neh_4:14; Psa_68:35, etc.) For it is holy; rather, holy is he. This may be a suggestion to those about to praise God—a putting of words into their mouth; or it may be an almost involuntary outburst of praise on the part of the psalmist.

The Pulpit Commentary
The King's strength also loveth judgment. "The king" is here the Lord, Jehovah (see Psa_98:3). His "strength," or might, "loves," and is always combined with, right (comp. Isa_61:8, "I the Lord love judgment"). Thou dost establish equity. The pronoun is emphatic: "Thou, even thou"—nearly equivalent to "thou only"—"dost establish equity." Thou—again emphatic—"thou, even thou"—executest judgment and righteousness in Jacob; i.e. governest thy people Israel with strict and absolute justice.

The Pulpit Commentary
Exalt ye the Lord our God (comp. Psa_99:9; and see also Psa_118:20 and Isa_25:1). And worship at his footstool. The "footstool of God" is everywhere (except in Isa_66:1) the ark of the covenant, which he that sat upon the cherubim touched, as it were, with his feet (see 1Ch_28:2; Psa_132:7; Lam_2:1; Isa_60:13). Israel is called upon to worship God as he sits in his holy temple, enthroned above the cherubim, with his feet upon the mercy seat. For he is holy; rather, as in Psa_99:3, holy is he.

The Pulpit Commentary
Moses and Aaron among his priests. Moses, though not called a priest in the Pentateuch, performed many priestly acts, such as sprinkling the blood of the covenant at Mount Sinai (Exo_24:6-8), setting in order the tabernacle (Exo_40:18-33), consecrating Aaron and his sons (Le Psa_8:6 -30), interceding for the people (Exo_32:30-32; Num_14:13-19), etc. He is therefore, not improperly, here included among God's priests. And Samuel among them that call upon his Name. Samuel was not a priest, but a simple Levite (1Ch_6:16-28). He was, however, a powerful intercessor with God, a righteous man whose effectual fervent prayer availed much. He is united with Moses by Jeremiah, as having weight with God through his prayers (Jer_15:1; see also 1Sa_12:19-22). They called upon the Lord, and he answered them (see Deu_11:19; Deu_10:10; 1Sa_12:17, etc.).

The Pulpit Commentary
He spake unto them in the cloudy pillar (see Exo_33:9, "And it came to pass, as Moses entered into the tabernacle, the cloudy pillar descended, and stood at the door.; and the Lord talked with Moses"). They kept his testimonies, and the ordinance that he gave them. Moses was known as "the servant of the Lord" (Deu_34:5; Jos_1:1, Jos_1:2, etc.). He was "faithful in all his house, as a servant" (Heb_3:5). Aaron was "the saint of the Lord" (Psa_106:16). This general obedience was, however, departed from in some few instances (see the comment on Psa_99:8).

The Pulpit Commentary
Thou answeredst them, O Lord our God (comp. Psa_99:6, ad fin.). Thou wast a God that forgavest them; literally, a forgiving God wast thou to them. Both Moses and Aaron "angered God at the waters of strife" (Psa_106:32; Num_20:12, Num_20:13). Aaron angered him still more by sanctioning the idolatry of the golden calf (Exo_32:1-24). God pardoned both of them these and other sins, but not without inflicting punishment for the sins. Though thou tookest vengeance of their inventions. God's "severity" extended even to these blessed saints, Moses, Aaron, and Samuel. The former two were expressly excluded from the land of promise for their conduct at Meribah (Num_20:12); and Samuel's judgeship seems to have been brought to an end through his undue leniency towards his sons Joel and Abiah (1Sa_8:1-5).

The Pulpit Commentary
Exalt the Lord our God, and worship at his holy hill. Repeated from Psa_99:5, with the slight variation that "his holy hill" is substituted for "his footstool"—Zion, on which the temple stood, for the sanctuary of the temple itself. For the Lord our God is holy; rather, for holy is the Lord our God (comp. Psa_99:3 and Psa_99:5).