On what day does John say he was in the Spirit?

Answer

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

By what name are the sacred writings of the Bible commonly known?
What relationship to God is established by faith?
How closely are righteousness and life thus united?
When did Christ say the good would he recompensed?
How had Moses spoken of another and greater dispersion?
What will be the fifth plague?
What did Christ learn through suffering?

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