Take Sides With Jehovah! (Song 143 from Sing Praises to Jehovah)

Watchtower Bible and Tract Society - Take Sides With Jehovah! is taken from Sing Praises to Jehovah released in 1984

1 John 4:1-3: “Test the inspired expressions to see whether they originate with God, because many false prophets have gone forth into the world. You gain the knowledge of the inspired expression from God by this: Every inspired expression that confesses Jesus Christ as having come in the flesh originates with God, but every inspired expression that does not confess Jesus does not originate with God.”

What is Beth Sarim?
https://en.wikipedia.org/wiki/Beth_Sarim

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Eschatology
https://en.wikipedia.org/wiki/Eschatology_of_Jehovah%27s_Witnesses#:~:text=The%20group's%20doctrines%20surrounding%201914,publications%20between%201879%20and%201924.