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 great truth was then stated?
What is the beginning of wisdom?
What is sin declared to be?
16. Could the offerings commanded by the ceremonial law satisfy or make perfect the conscience of the believer?
Wherein does the new covenant differ from and excel the old?
What unites all believers under the new covenant?
To what place did Jesus retire for secret devotion?

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