“Their line is gone out through all the earth, and their words to the end of the world" what does this mean ? Can you explain?
Exactly."is gone out": I think there have been other threads that have explained that early modern Englishused the verb "to be" instead of the verb "to have" as an auxiliary to form the perfect tenses for verbs that involve motion. English is a Germanic language despite its vocabulary, and other Germanic languages still do this. It might have been an obsolete pattern even when King James I's committee was translating the Bible. "Their line is gone out" = "Their line has gone out" in modern English.
For Jesus Christ our Saviour was born upon this day,
To save our souls from Satan's power when we were gone astray.