What would make the death of Christ in vain?

Answer

"If righteousness come by the law, then Christ is dead in vain." Gal. 2: 21.

How did Christ make it clear to them that the Scriptures testify of Him?
Where were the Ten Commandments placed?
What did Christ nail to His cross?
Until what time were the saints to he persecuted under the Roman power?
Where did John, in vision, see the saints?
What is Satan himself called?
What encouragement does Jesus give us to meet cheerfully the troubles and trials of life?

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