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.

By whom was this fulfilled?
In whose name should everything be done?
What command did the Lord later give to Abraham?
What two covenants are contrasted in the Bible?
Why is sorrow better than laughter?
How were their prayers answered?
In the new earth, what will he no more?

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