Looking at Isaiah40:3

Isaiah 40:3 "The voice of him that crieth in the wilderness, Prepare ye the way of the L-RD, make straight in the desert a highway for our G-d."

Compare with

Matthew 3:1-3 "In those days came John the Baptist, preaching in the wilderness of Judaea, 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 L-RD, make his paths straight."

Have you noticed the Tenach and the New Covenant interact with each other and give the same witness concerning the Messiah.