“He must increase; I must decrease.” (John 3:30)

From this conersation, we can see that John the Baptist possessed a great heart and mind.
In addition, we cannot neglect to mention the story of the two disciples of John the Baptist, Andrew and John’s decision to follow Jesus:

“The next day John was there again with two of his disciples, and as he watched Jesus walk by, he said, "Behold, the Lamb of God." The two disciples heard what he said and followed Jesus.

Jesus turned and saw them following him and said to them, "What are you looking for?" They said to him, "Rabbi" (which translated means Teacher), "where are you staying?" He said to them, "Come, and you will see." So they went and saw where he was staying, and they stayed with him that day. It was about four in the afternoon.
Andrew, the brother of Simon Peter, was one of the two who heard John and followed Jesus. He first found his own brother Simon and told him, "We have found the Messiah" (which is translated Anointed).
Then he brought him to Jesus. Jesus looked at him and said, "You are Simon the son of John; you will be called Cephas" (which is translated Peter).” (John 1:35-42)

From John’s dynamic description, we can see that the disciples were anxious to spread the good news after they had come into contact with Jesus.

Indeed, whoever looks back is not suitable to be God’s messenger.