I am the voice] Isaiah 40:3. Matthew 3:3. Luke 3. 4. one whose Office was to lift up his voice, and crie in the ears of deaf sinners. the wildernesse] See Luke 3:2. make streight] Make plain. Isay in the Letter spake of their marvellous deliverance under Cyrus, which was a type of our spirituall deliverance by Christ.