What Is Isaiah in the Bible?
Person
One of the great prophets of Israel. He preached about 700 years before Jesus. The book that bears his name announces a voice crying out in the desert: “Prepare the way of the Lord.”
Where it appears in the Bible
Mark 1:2-3; Isaiah 40:3
What the Bible says
Mark 1:2-3
2As it is written in Isaias the prophet: Behold I send my angel before thy face, who shall prepare the way before thee. 3A voice of one crying in the desert: Prepare ye the way of the Lord, make straight his paths.
Isaiah 40:3
The voice of one crying in the desert: Prepare ye the way of the Lord, make straight in the wilderness the paths of our God.
Douay-Rheims Bible (Challoner revision), public domain.
Source: Catholic Encyclopedia (1913), “Isaias”; NABRE notes on Mc 1, 2-3 and on Is 40–55