In what way were there none greater than John the Baptist?

In what way were there none greater than John the Baptist (Matthew 11:11)?

Gabriel had told Zecharias before John’s birth that "he shall be great in the sight of the Lord" (Luke 1:15). That greatness is in the context of remarks about John’s person or character. This assessment in Matthew, however, follows the Lord’s statement about John’s exalted service: he "shall prepare Thy way before Thee." Among all men, what a great privilege and honor it is to be entrusted by the Lord with a work to do for Him. Among all to whom the Lord has entrusted a work, no one’s responsibility involved a higher privilege and honor than John’s; he prepared the way before the Lord, personally introducing to God’s chosen people the long-promised Messiah, Deliverer, and Lamb of God. In a unique sense, John was "My messenger"; four of the five times that expression occurs it refers to John. This is quite an honor bestowed on John!

D. Oliver