Answer: God's children are a chosen people, a royal priesthood, a holy nation and a people belonging to God so that we might declare the praises of God, (verse 9).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
Isaiah 43:20-21: [God said,] "The wild animals honor Me, the jackals and the owls, because I provide water in the desert and streams in the wasteland, to give drink to My people, My chosen, the people I formed for Myself that they may proclaim My praise."
Acts 2:11: "we hear them declaring the wonders of God in our own tongues!"
1 Corinthians 15:1-11: "Now, brothers, I want to remind you of the Gospel I preached to you, which you received and on which you have taken your stand. By this Gospel you are saved, if you hold firmly to the Word I preached to you. Otherwise, you have believed in vain. For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, that He was buried, that He was raised on the third day according to the Scriptures, and that He appeared to Peter, and then to the Twelve. After that, He appeared to more than five hundred of the brothers at the same time, most of whom are still living, though some have fallen asleep. Then He appeared to James, then to all the apostles, and last of all He appeared to me also, as to one abnormally born. For I am the least of the apostles and do not even deserve to be called an apostle, because I persecuted the church of God. But by the grace of God I am what I am, and His grace to me was not without effect. No, I worked harder than all of them--yet not I, but the grace of God that was with me. Whether, then, it was I or they, this is what we preach, and this is what you believed."
1 Peter 1:3-9: "Praise be to the God and Father of our Lord Jesus Christ! In His great mercy He has given us new birth into a living hope through the resurrection of Jesus Christ from the dead, and into an inheritance that can never perish, spoil or fade--kept in heaven for you, who through faith are shielded by God's power until the coming of the salvation that is ready to be revealed in the last time. In this you greatly rejoice, though now for a little while you may have had to suffer grief in all kinds of trials. These have come so that your faith--of greater worth than gold, which perishes even though refined by fire--may be proved genuine and may result in praise, glory and honor when Jesus Christ is revealed. Though you have not seen Him, you love Him; and even though you do not see Him now, you believe in Him and are filled with an inexpressible and glorious joy, for you are receiving the goal of your faith, the salvation of your souls."
Revelation 5:11-13: "Then I looked and heard the voice of many angels, numbering thousands upon thousands, and ten thousand times ten thousand. They encircled the throne and the living creatures and the elders. In a loud voice they sang: ‘Worthy is the Lamb, Who was slain, to receive power and wealth and wisdom and strength and honor and glory and praise!' Then I heard every creature in heaven and on earth and under the earth and on the sea, and all that is in them, singing: ‘To Him Who sits on the throne and to the Lamb be praise and honor and glory and power, for ever and ever!'"