What did Jesus say about John the Baptist?

In Matthew 11:10 we learn specifically what Jesus said of John the Baptist.

“This is he of whom it is written, ‘Behold, I send my messenger before thy face, who shall prepare thy way before thee.’
Truly, I say to you, among those born of women there has risen no one greater than John the Baptist; yet he who is least in the kingdom of heaven has suffered violence, and men of violence take it by force. For all the prophets and the law prophesied until John; and if you are willing to accept it, he is Elijah who is to come. He who has ears to hear, let him hear.” (Matthew 11:10-15)