Seeing that Jehovah has chosen Zion. By coupling the kingdom with the priesthood and sanctuary service, he declares it still more emphatically to have been of divine and not human appointment. The connection is not to be overlooked, on another account. The true strength and stability of that kingdom were in Christ, and Christ's kingdom is inseparable from his priesthood. This may explain why mention is made of Zion being chosen. God decreed nothing in relation to the kingdom, but what had a certain connection with the sanctuary, the more perfectly to prefigure the Mediator who was to come, and who was both priest and king, after the order of Melchizedek. The kingdom and tabernacle were, therefore, closely allied. Notice is taken of the reason upon which the choice proceeded that mount Zion was not chosen for any excellency belonging to it, as we have seen, (Psalm 68:16,) but because such was the will of God. His good pleasure is specified in contrast with any merit in the place itself. This is another proof of what we have already stated that the covenant made by God with David proceeded from his mere goodness.

For the Lord hath chosen Zion - He has selected it as the place where he will abide; the seat of his religion. This is a new plea or argument, and shows that the psalm had reference to Zion or Jerusalem, as then in danger, or as having been in danger. See the notes at Psalm 48:1-2.
He hath desired it for his habitation - A place where to abide. Its had selected this as the permanent place of his worship.

The Lord hath chosen Zion - Therefore neither Shiloh nor Kirjath-jearim is the place of his rest.

For the Lord hath chosen Zion,.... Not only to build upon it the temple in a literal sense, and for the place of his worship; but also for the seat of his majesty, and over which he has set his Son as King; and all this from the love he bears to Zion, which, in a figurative and spiritual sense, is his church; whom he has chosen to privileges, to grace and glory, and for his service and honour; see Psalm 78:67;
he hath desired it for his habitation; heaven is the habitation of his holiness and glory; Christ is his dwelling place, in whom all the fulness of the Godhead dwells bodily: yet his desire is to his church and people; his heart is set upon them, and upon their salvation; his delight is in them, and he takes pleasure in walking with them, and dwelling among them; they being built up an habitation for God through the Spirit; see Psalm 68:16.

is made on the ground of God's choice of Zion (here used for Jerusalem) as His dwelling, inasmuch as the prosperity of the kingdom was connected with that of the Church (Psalm 122:8-9).