How was Christ's first advent to be heralded?

Answer

"The voice of him that crieth in the wilderness, Prepare ye the way of the Lord, make straight in the desert
a highway for our God." Isa. 40: 3.

What precedes the manifestation of sin ?
What is required besides a belief in the existence of God?
What did those do who were baptized of John?
By what other title is the Comforter designated?
In consequence of this, what value did Christ place upon their worship?
What promise is made to the willing and obedient?
What requirement was made by these teachers from Judea concerning the ceremonial law?

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