Isaiah 40:3 (KJV) 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.

Mark 1:2-5 (KJV) As it is written in the prophets, Behold, I send my messenger before thy face, which shall prepare thy way before thee.
The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.
John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.
And there went out unto him all the land of Judaea, and they of Jerusalem, and were all baptized of him in the river of Jordan, confessing their sins.

Matthew 3:2-3 (KJV) And saying, Repent ye: for the kingdom of heaven is at hand.
For this is he that was spoken of by the prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.

This quote is by Ellen White
Conflict and Courage
Page 272.3, 273.5
A straight message

In this age, just prior to the second coming of Christ in the clouds of heaven, such a work as that of John is to be done. God calls for men who will prepare a people to stand in the great day of the Lord.... As a people who believe in Christ's soon coming, we have a message to bear,—"prepare to meet thy God." Our message must be as direct as was the message of John. He rebuked kings for their iniquity. Notwithstanding that his life was imperiled, he did not hesitate to declare God's word. And our work in this age must be done as faithfully.
In order to give such a message as John gave, we must have a spiritual experience like his. The same work must be wrought in us. We must behold God, and in beholding Him, lose sight of self. CC 272.4 - CC 272.5