God is greatly to be feared - There is that in him which is suited to fill the mind with solemn feelings, and this is a proper state of mind with which to come before him. Nature teaches us that God should be approached with awe; and all the teachings of revelation confirm this. His power is to be feared; his justice is to be feared; his holiness is to be feared; and there is much also in his goodness, his benevolence, his mercy, to fill the mind with solemn emotions.
In the assembly of the saints - The assembly of the holy; the assembly that is convened for his worship. The reference here may be either to worshippers on earth or in heaven. Wherever, and whenever, in this world or in other worlds, creatures are engaged in the worship of God, there should be deep solemnity and reverence. On the word rendered "assembly" here - סוד sôd - a council, or assemblage for counsel, see Psalm 25:14, note; Psalm 64:2, note; compare Job 15:8. The idea here is founded on what is said in the previous verse, that none can be compared with God.
And to be had in reverence - In fear; in awe.
Of all them that are about him - That approach him; that are in his presence. The conscious presence of God should fill the mind with awe. When we feel that his eye is upon us, when we know that he sees us, how can we trifle and be thoughtless? How can we then be sinful?

God is greatly to be feared - In all religious assemblies the deepest reverence for God should rest upon the people. Where this does not prevail, there is no true worship. While some come with a proper Scriptural boldness to the throne of grace, there are others who come into the presence of God with a reprehensible, if not sinful, boldness.

God is greatly to be feared in the assembly of the (h) saints, and to be had in reverence of all [them that are] about him.
(h) If the angels tremble before God's majesty and infinite justice, what earthly creature by oppressing the Church dares to set himself against God?

God is greatly to be feared in the assembly of the saints,.... Which Jarchi and Kimchi understand of angels again, and render it "God is to be feared in the great assembly of them"; for they are a very large number, even an innumerable company, in and by whom the Lord is feared and worshipped, Hebrews 12:21, but rather an assembly or congregation of holy men are designed: it is the duty of such to assemble together publicly for religious worship; they ought to do it on account of the Lord, who requires it, and encourages it by his presence, he has promised; on the account of themselves, it being for their profit and pleasure; and on the account of others, for their conversion and comfort; and in imitation of the people of God, in all ages; nor should they forsake the assembling of themselves: the word rendered "assembly", signifies "counsel" or "secret"; see Genesis 49:6 and so the Targum,
"God is mighty in the secrets of the saints, sitting on a throne of glory;''
in the assembly of the saints, the secrets of God's love are disclosed unto them; the doctrines and mysteries of his grace, called the whole counsel of God, Acts 20:27 are there made known; and the ordinances of the Gospel, which also are styled the counsel of God, Luke 7:30, are there administered: now, where all this is done,
God is greatly feared herein; not with a slavish fear, a fear of hell and damnation, such as may be in devils; nor with an hypocritical fear, such as is taught by the precepts of men; but with a filial, godly fear, such as is peculiar to the children of God; with an holy and humble fear, with a fiducial and fearless one; with a reverential affection for the Divine Being, and such as includes all worship of him, internal and external: and to be had in reverence of all them that are about him; which the Targum paraphrases
"and is to be feared above all the angels that stand round about him''
and so Kimchi interprets it; see Revelation 5:11, but the same thing, in different words, is meant, as in the preceding clause.

Feared - With a fear of reverence. Saints - The whole society of angels. All that - That encompass his throne.