Many of the psalms are very depressing. They cry out to God about being persecuted or forgotten or trampled under foot. Then there are other psalms that are absolutely joyous and wonderful and celebratory. Psalm 47 fits into this latter category.
Clap your hands, all you people!
Shout joyfully to God with a joyous shout!
2 Because the Lord Most High is awesome,
he is the great king of the whole world.
3 He subdues the nations under us,
subdues all people beneath our feet.
4 He chooses our inheritance for us:
the heights of Jacob, which he loves. Selah
5 God has gone up with a joyous shout—
the Lord with the blast of the ram’s horn.
6 Sing praises to God! Sing praises!
Sing praises to our king! Sing praises
7 because God is king of the whole world!
Sing praises with a song of instruction!
8 God is king over the nations.
God sits on his holy throne.
9 The leaders of all people are gathered
with the people of Abraham’s God
because the earth’s guardians belong to God;
God is exalted beyond all.
This psalm really captures the attitude of the messianic age, when all peoples are united with the descendants of Abraham in worshiping the one, true God. This is the vision of the Church, which has people redeemed from every tribe, nation, and language all worshiping the Father, Son, and Holy Spirit–the Trinity, the one, true, Living God. When this happens, we can do little else but sing praises!