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 prophetic declaration foretold this truth?
Why was it necessary for Christ to go away?
When will the gifts of the Spirit he no longer needed?
What special reason is given for this?
What is declared to be the chief advantage possessed by the Jews?
What only can overcome the world?
Why are its gates not to be closed?

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