If Jesus Christ was just a man, as you claim, then he would have rebuked Thomas. But he didn't.
DID THE LORD JESUS CORRECT THOMAS FROM HIS MISTAKE?
Let us again see what really happened through the four Gospels, not only from the Gospel according to John. Let us start with John 20:19-20:
“Then, the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled, for fear of the Jews, Jesus came and stood in the midst, and said to them, ‘Peace be with you.’ When He had said this, He showed them His hands and His side. Then the disciples were glad when they saw the Lord.” (John 20:19-20, NKJV)
When the disciples were assembled, with the doors locked for the fear of the Jews, Jesus came and told them to be at peace. Then He showed to them His hands and side. What was their reaction? The disciples were glad when they saw the Lord. However, John further narrated that Thomas was not there that time:
“Now Thomas, called the Twin, one of the twelve, was not with them when Jesus came. The other disciples therefore said to him, ‘We have seen the Lord.’ So he said to them, ‘Unless I see in His hands the print of the nails, and put my finger into the print of the nails, and put my hand into His side, I will not believe.’” (John 20:24-25, NKJV)
When the other disciples told Thomas that they had seen the Lord, Thomas did not believe what they said. He reacted with disbelief and skepticism. He told them, “
Unless I see in His hands the print of the nails, and put my finger into the print of the nails, and put my hand into His side, I will not believe.” By this statement, Thomas became identified with skepticism and disbelief. The disciples were gathered again and Thomas was with them at this time:
“And after eight days His disciples were again inside, and Thomas with them. Jesus came, the doors being shut, and stood in the midst, and said, ‘Peace to you!’” (John 20:26, NKJV)
The disciples were again inside and Thomas was with them. Originally, there were twelve apostles. However, Judas committed suicide, thus, when the Bible stated “eleven,” Thomas was with them (Judas was the the one not with them). In John 20:26, Jesus appeared to the “eleven” (Thgomas was with them). This was when Thomas uttered “My Lord and my God”:
“And after eight days His disciples were again inside, and Thomas with them. Jesus came, the doors being shut, and stood in the midst, and said, ‘Peace to you!’ Then He said to Thomas, ‘Reach your finger here, and look at My hands; and reach your hand here, and put it into My side. Do not be unbelieving, but believing.’ And Thomas answered and said to Him, ‘My Lord and my God!’” (John 20:26-28, NKJV)
Mark also reported this event when Jesus appeared to the “eleven” as they were eating:
“And when they heard that He was alive and had been seen by her, they did not believe. After that, He appeared in another form to two of them as they walked and went into the country. And they went and told it to the rest, but they did not believe them either. Later He appeared to the eleven as they sat at the table; and He rebuked their unbelief and hardness of heart, because they did not believe those who had seen Him after He had risen.” (Mark 16:11-14, NKJV)
Luke also narrated this event when the Lord Jesus appeared to the “eleven”:
“So they rose up that very hour and returned to Jerusalem, and found the eleven and those who were with them gathered together, saying, ‘The Lord is risen indeed, and has appeared to Simon!’ And they told about the things that had happened on the road, and how He was known to them in the breaking of bread. Now as they said these things, Jesus Himself stood in the midst of them, and said to them, ‘Peace to you.’ But they were terrified and frightened, and supposed they had seen a spirit.” (Luke 24:33-37 NKJV)
Both Mark and Luke reported this event when the Lord Jesus appeared to the “eleven” (Mark 16:13-14 and Luke 24:33-36). Thus, this was also the event reported by John in John 20:26-28, when Jesus appeared with the “eleven” (including Thomas).
Mark’s report was a generalization of the event: the disciples’ unbelief, the Lord appeared to the “twelve,” and Jesus “rebuked their unbelief and hardness of heart.”
Luke made a much detailed report that Mark. In Luke’s report, when the Lord Jesus appeared to the “eleven,” they were terrified and frightened. Thus, it was not only Thomas who was terrified and frightened during that event, but even the other disciples.
Think of the situation before Jesus showed Himself to them: the doors were shut when Jesus abruptly stood in their midst and summoned Thomas to come near to Him. What was Thomas' reaction? A reaction of unbelief and amazement. Is this kind of reaction something that is strange or unusual? No, because according to Luke, Thomas was not the only one caught perplexed but also the rest of his companions. Luke reported that when Jesus appeared abruptly in their midst while the “eleven” were gathered together, they were terrified and frightened.
Because the disciples (not only Thomas but all the “eleven”) were caught perplexed (were terrified and frightened), Luke reported that “and supposed they had seen a spirit.” Luke reported that disciples mistook Jesus for a spirit. John on the other hand reported that Thomas called Jesus “My Lord and my God.” Why it is not wrong to conclude that not only Thomas but the other disciples also mistook Jesus as “God”? Because Jesus Himself taught them that God is spirit:
“God is Spirit, and those who worship Him must worship in spirit and truth.” (John 4:24 NKJV)
Did the Lord Jesus Christ confirm what the disciples thought about Him or He rebuke them? Let us continue our reading of Luke’s report
“Now as they said these things, Jesus Himself stood in the midst of them, and said to them, "Peace to you." But they were terrified and frightened, and supposed they had seen a spirit. And He said to them, "Why are you troubled? And why do doubts arise in your hearts? Behold My hands and My feet, that it is I Myself. Handle Me and see, for a spirit does not have flesh and bones as you see I have." Luke 24:36-39, NKJV
Take note that the Lord Jesus was speaking to the “eleven” (including Thomas); the “eleven” mistook Jesus for a spirit or mistook Him as “God” (thus not only Thomas but the other apostles also committed the mistake that they mistook Jesus as “God”); but Jesus rebuked them.
In John’s report, Jesus summoned Thomas to reach out his finger, to look at His hands, and to reach out his hand to Him (
cf. John 20:27), and then Thomas mistakenly said, “My Lord and my God” (
cf. John 20:28). In Luke’s report, not only Thomas but all the “eleven” mistook Jesus for a spirit or mistook Him as “God.”
What did Christ do when they mistook Him for a spirit? He showed them His hands and His feet and told them that a spirit has no flesh and bones (
cf. Luke 24:38-39). Notice that before He showed His hands and feet, what did Christ tell them? “Why are ye troubled? And why do thoughts arise in your hearts?” (
cf. Luke 24:38, KJV). Christ was clearly upbraiding them.
Christ’s statements in Luke 24:39 is also tacitly teaching them that He is not God. Remember that prior to this event, The Lord Jesus Christ had earlier instructed the disciples about the nature of God. He taught them that God is a spirit (
cf. John 4:24). The apostles mistook Him for a spirit which is tantamount to falsely thinking of Christ as having the same nature as God or being God Himself. Is this only an assumption? The very fact that Thomas stated to Jesus, “My Lord and my God!” serves as palpable evidence that they had indeed believed a mistaken identity of Jesus. But, Jesus immediately corrected their wrong conclusion concerning His nature. He emphasized to them that He is not a spirit (Luke 24:39), which is equivalent to saying that He is not God in His state of being.
Jesus’ statement in Luke 24:39 serves as His didactical teaching to anyone who would think of Him as God. The clarification He made to those who thought of Him as a spirit is a reminder to anyone who would mistakenly think of Him as God. Whenever someone has a question regarding the true nature of Jesus Christ, he should be reminded simply about Jesus’ own statements in Luke 24:39 and His acknowledgment of His nature in John 8:40 wherein He emphatically declared:
“I am a man who has told you the truth which I heard from God, but you are trying to kill me. Abraham did nothing like that.” (John 8:40, NCV)