Through Christ, what has been opened to the house of David?

Answer

"In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for
sin and for uncleanness." Zech. 13: 1.

What would make the death of Christ in vain?
What is God ready to do for all who seek forgiveness?
What does Christ thus become to the believer?
What threefold union is thus established?
What is the love of God declared to be?
With whose blood was the new covenant dedicated?
Who is this dragon said to be?

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