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 Psalms 25:14, note; Psalms 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?