I see no reason to limit this Song of joy and exultation to the Church. We shall have very blessed views of the Church's Lord and Saviour, if we accept the words as first spoken by Christ, and next as adopted by the Church, from her conscious union with Christ, and an interest in all that belongs to him. When God the Father gave Christ his Church, it is said, that it was his heart's desire, and that his glory was great in his salvation. See Psalms 21:1-6. It is always blessed, yea, it is twice blessed, first, to behold Christ, in everything of salvation, and then his Church, as in him.
Related Commentaries of Isaiah 61:10
Isaiah 61:10-11
10 I will greatly rejoice in the LORD, my soul shall be joyful in my God; for he hath clothed me with the garments of salvation, he hath covered me with the robe of righteousness, as a bridegroom decketha himself with ornaments, and as a bride adorneth herself with her jewels.
11 For as the earth bringeth forth her bud, and as the garden causeth the things that are sown in it to spring forth; so the Lord GOD will cause righteousness and praise to spring forth before all the nations.