Let everything that has breath praise the Lord

Psalm 149-150
 Praise the Lord! Sing to the Lord a new song, his praise in the assembly of the saints.
The Lord takes delight in his people; he crowns the humble with salvation.
May the praise of God be in their mouths and a double-edged sword in their hands, to inflict vengeance on the nations and punishment on the peoples.
Praise God for his acts of power; praise him for his surpassing greatness.
Let everything that has breath praise the Lord.
Every instrument in the Temple orchestra, everything with life and breath in the whole creation, is called to join in a mighty crashing paean(歡樂歌) of praise to God.
Why?
This is a public psalm, for the assemble people. They rejoice in military triumph, with drums ad dancing, at the victory God has given. Their enemies are vanquished, subject, and punished.
The double-edges swords in the New Testament is a metaphor for the word of God. God's word has power to resolve the mystery in heart of men.
Vengeance: Victory for the downtrodden necessarily entails defeat for the forces of oppression.
How?
Praise God for his surpassing greatness, for his acts of power. Let everything that has breath praise the Lord. Let more people turn to the Lord!