Can you help me out with the meaning of

[Questions321]

This may be a silly question but there are a couple things we hear/say frequently that I truthfully have never put much thought into. Would love if someone could help me out with the meanings

“Sing to the Lord a new song” what does a new song mean?
“Lord God of hosts” what does hosts mean?

 

[BartholomewB]

“Lord God of hosts ” what does hosts mean?

Armies. In the OT God is frequently addressed as “the Lord of hosts,” notably in Isaiah 6:3, where the word for “hosts” or “armies” is often left in the original Hebrew: Holy, holy, holy, Lord God of Sabaoth …

It’s the original Biblical text of the Sanctus.

Isaiah 6:3 NRSVCE - - Bible Gateway

 

[End_Timer]

And they sang a new song: You are worthy to take the scroll and to open its seals, because You were slain, and You redeemed people for God by Your blood from every tribe and language and people and nation.
And you have made them a kingdom and priests to our God, and they shall reign on the earth.”
I heard every creature in heaven, on earth, under the earth, on the sea, and everything in them say: Blessing and honor and glory and dominion to the One seated on the throne, and to the Lamb, forever and ever!..Rev 5:9

 

[Tis_Bearself]

“Sing to the Lord a new song ” what does a new song mean?

Language about singing a “new song” appears in Psalms 96 and 149.
St. Augustine in his “Exposition on the Psalms” equated the “Old song” with love of temporal and earthly things, and with the Old Testament (old covenant). He equates the “New song” with love of God, with Christian unity, with building up the kingdom of God as a group, and with the New Covenant which Jesus brought.

https://www.newadvent.org/fathers/1801096.htm

https://www.newadvent.org/fathers/1801149.htm

 

[JGD]

For me, it’s the Holy Sacrifice of the Mass – the new liturgical worship of the New Testament.
The Book of Revelation, Chapter 5, seems to me to be the Mass as it takes place in heaven where Jesus is seen as a "Lamb standing, as though it had been slain (Rev. 5:6); and where John saw those in heaven as they “sang a new song.” Rev. 5:9

It was Sunday, the NT required day of worship, when John had this vision. Rev. 1:10