On what day was John in the Spirit?

Answer

"I was in the Spirit on the Lord's day." Rev. 1: 10.

5. What further statement of Christ seems to lay the responsibility for the origin of sin upon Satan and his angels?
How are those described who accept this message?
What divine purpose was wrought out in the sufferings of Christ?
Will the Sabbath be observed as a day of worship in the new earth?
In what language had some of the Old Testament prophets already foretold these signs?
Who notes the groans of the prisoner?
To what Old Testament promise did Peter evidently refer?

Questions & Answers are from the book Bible Readings for the Home Circle