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.

Does it matter what one believes, so long as he is sincere?
In His first recorded discourse, what did Christ say of the law?
What question did the disciples ask Christ concerning His second coming?
For what purpose did Christ say He would come again?
What scene in heaven was presented to the prophet as the seventh trumpet was about to sound?
What is to be the reward of those whose works are good?
What will follow this great conflagration?

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