Then they asked him, "Who is the man who said to you, 'Take up your mat, and walk'?"
It is not at all clear whether this man believed on Jesus. We do not know either if he sought a closer relationship with Jesus following his healing. Many people accept God’s gifts but ignore the giver. Some experience miracles but do not go to heaven. Apparently it was not the reaction of this man that John wanted to emphasize but the lesson on the importance of believing in Him that Jesus used the occasion of this healing to teach.