(37) And as a faithful witness in heaven.--Rather, and there is a faithful witness in heaven, which the parallelism shows to be the moon, just mentioned. The moon (see Psalm 81:3) was to the Jews--as to the ancients generally--the "arbiter of festivals," and the festivals were signs of the covenant, consequently that luminary might well be called "a witness in heaven."
Verse 37. - It shall be established forever as the moon (comp. Psalm 72:7). And as a faithful witness in heaven. Some understand this expression of the moon; but, as Professor Cheyne comments, "Who could witness (or declare) that such great things were true but Jehovah?" (So too Delitzsch, Kay, and Canon Cook.) If this be regarded as the true meaning, it will be better to translate, "the true witness." Job's citation of God as his witness (Job 16:19) is scarcely parallel.
89:19-37 The Lord anointed David with the holy oil, not only as an emblem of the graces and gifts he received, but as a type of Christ, the King Priest, and Prophet, anointed with the Holy Ghost without measure. David after his anointing, was persecuted, but none could gain advantage against him. Yet all this was a faint shadow of the Redeemer's sufferings, deliverance, glory, and authority, in whom alone these predictions and promises are fully brought to pass. He is the mighty God. This is the Redeemer appointed for us, who alone is able to complete the work of our salvation. Let us seek an interest in these blessings, by the witness of the Holy Spirit in our hearts. As the Lord corrected the posterity of David for their transgressions, so his people shall be corrected for their sins. Yet it is but a rod, not a sword; it is to correct, not to destroy. It is a rod in the hand of God, who is wise, and knows what he does; gracious, and will do what is best. It is a rod which they shall never feel, but when there is need. As the sun and moon remain in heaven, whatever changes there seem to be in them, and again appear in due season; so the covenant of grace made in Christ, whatever alteration seems to come to it, should not be questioned.
It shall be established for ever as the moon,.... Either Christ's seed, or throne, which comes to much the same sense; for by both are meant his church and people, his kingdom and interest in the world; the moon is as perpetual as the sun, and is used as elsewhere to signify the continuance of the people, church, and interest of Christ, Psalm 72:5, for though the moon has its spots, and is changeable, sometimes in the full, and sometimes in the decline, yet always is, and always continues, and ever will; and so though the people of God have their spots and imperfections, and are sometimes on the decline in the frames and dispositions of their minds, in the exercise of grace, in their spirituality, liveliness, and zeal, and in their walk and conversation in the church and world; yet they shall abide and persevere to the end; and though the church may be like the moon in the wane, be declining as to numbers, gifts, and graces, yet it shall continue and be established; it is sometimes indeed in a fluctuating state, and is not always in the same place, but is removed from one country to another; yet it always is somewhere, even though in the wilderness, and ere long will be established on the top of the mountains, and be no more a tabernacle that shall be taken down; see Psalm 48:8.
and as a faithful witness in heaven: or "in the sky or cloud" (b); some understand this of the moon, others of both sun and moon; but it seems best to interpret it of something distinct from either, even of the rainbow, which though it does not always appear in the clouds, yet it has appeared at times, and does and will unto the end of the world; and be a faithful and an everlasting token and witness of the covenant of God made with all creatures, that he will no more destroy the world by a flood, Genesis 9:12, and is an emblem of the covenant of grace, and of the continuance, perpetuity, and immutability of it; see Isaiah 54:9.
and as a faithful witness in heaven: or "in the sky or cloud" (b); some understand this of the moon, others of both sun and moon; but it seems best to interpret it of something distinct from either, even of the rainbow, which though it does not always appear in the clouds, yet it has appeared at times, and does and will unto the end of the world; and be a faithful and an everlasting token and witness of the covenant of God made with all creatures, that he will no more destroy the world by a flood, Genesis 9:12, and is an emblem of the covenant of grace, and of the continuance, perpetuity, and immutability of it; see Isaiah 54:9.
Selah. See Gill on Psalm 3:2.
(b) "in aethere", Montanus, Tigurine version, Vatablus; "in superiore nube", Junius & Tremellius; "in nubibus", Gejerus.