What does the Bible say about John the Baptist?

In John 1:23, John the Baptist identifies himself as 'the voice of one crying in the wilderness,' which is a fulfillment of the prophecy given by Isaiah. His role was not only to announce the coming of the Messiah but also to prepare the hearts of the people to receive Him. John came as a humble servant, proclaiming repentance and pointing others to Jesus, who he called 'the Lamb of God that takes away the sin of the world' (John 1:29). Through his ministry, he emphasized the need for spiritual readiness as he prepared the way for Christ's arrival.