We see here that there are many ways to praise the Lord. In the dance, with instruments, singing, speaking his praises with our mouths. We also see how God will use the saints and the two edge sword to execute judgment upon the wicked. Wonderful reminders.
One thing that really stands out to me is verse 2. We are spiritual Israel. We should rejoice in our creator, the one who made all that exists. We should be joyful in our King, the Lord Jesus Christ. He is worthy of our praise. We owe him everything. We wouldn't exist if it was not for Jesus, and we only exist for his pleasure.