This is why Jesus, without providing a straightforward answer to John’s query and alluding to Isaiah's prophecy, instructed them, 'Go and inform John of what you have seen and heard: the blind receive sight, the lame walk, lepers are cleansed, the deaf hear, the dead are raised, and the poor have the Gospel proclaimed to them.’ Although Jesus’ reply was indirect, John’s disciples were expected to interpret it as: Inform John of everything you have witnessed and heard, and he will echo the words of Isaiah to you: Be strong, do not fear; here is your God, and He... will save you!
John’s followers should have understood Jesus’ message in this manner because He concluded by proclaiming, ‘Blessed is the one who is not offended by me,’ signifying that they should not doubt His identity as the promised One. However, it remains unclear whether John’s disciples comprehended Jesus’ response as intended since the Evangelists do not clarify this. It appeared that their experiences should have left a profound impact on their hearts, which were not yet fully aligned with Jesus: all those healed of various ailments, those who were given sight and the ability to speak, the weary, and the destitute in spirit, all bore witness to the glory of Jesus. John’s disciples needed only to embrace this good news, and many indeed came to believe in Jesus Christ as the genuine Messiah, although not all. Some persisted in their refusal to acknowledge Him, forming a distinct sect following John’s death.
As John's messengers departed, their arrival and their inquiry on John's behalf may have stirred uncertainty among those present with Jesus. Many might have speculated that it was John himself questioning Jesus, ‘Is He the One who is to come, or should we await another?’ If John posed such a question, it would imply he harbored doubts about Jesus, suggesting he had misjudged Him at the Jordan, and now, after being advised to exercise caution in prison, he hesitated and was unsure of the identity of the One he had designated as the Lamb who takes away the sins of the world. To counter these doubts, it was crucial to remind those who were beginning to overlook John of the multitudes that had flocked to him in the wilderness of the Jordan, eager to hear his proclamation about the coming Kingdom of Heaven, to repent, and to receive baptism. They should recall how he confronted the Pharisees and Sadducees, and the responses he provided to those sent by the chief priests.