Jesus Meets Our Doubts With Lavish Assurances
Luke 24:38–39 (ESV) … “And he said to them, “Why are you troubled, and why do doubts arise in your hearts? See my hands and my feet, that it is I myself. Touch me, and see. For a spirit does not have flesh and bones as you see that I have.”
The disciples were probably assembled in the upper room, where the Lord’s Supper had been instituted, and which became their ordinary meeting-place (Acts 1) up till Pentecost. What sights that room saw! There, when night had come, they were discussing the strange reports of the Resurrection, when, all suddenly, they saw Jesus, not coming or moving, but standing in the midst. Had He come in unnoticed by them in their eager talk? The doors were shut. How had this calm Presence become visible all at once?
So little were they the enthusiastic, credulous people whom modern theories which explain away the Resurrection assume them to have been, that even His familiar voice in His familiar salutation, tenfold more significant now than ever before, did not wake belief that it was verily He. They fled to the ready refuge of supposing that they saw ‘a spirit.’ Our Lord has no rebukes for their incredulity, but patiently resumes His old task of instruction, and condescends to let them have the evidence of two senses, not shrinking from their investigating touch. When even these proofs were seen by Him to be insufficient, He added the yet more cogent one of ‘eating before them.’ Then they were convinced.
Now their incredulity is important, and the acknowledgment shows the simple historical good faith of the narrator. A witness who at first disbelieved is all the more trustworthy. These hopeless mourners who had forgotten all Christ’s prophecies of His Resurrection, and were so fixed in their despair that the two from Emmaus could not so far kindle a gleam of hope as to make them believe that their Lord stood before them, were not the kind of people in whom hallucination would operate, as modern deniers of the Resurrection make them out to have been. What changed their mood? A fancy? Surely nothing less than a solid fact. Hallucination may lay hold on a solitary, morbid mind, but it does not attack a company, and it scarcely reaches to fancying touch and the sight of eating.
Note Luke’s explanation of the persistent incredulity, as being ‘for joy.’ It is like his notice that the three in Gethsemane ‘slept for sorrow.’ Great emotion sometimes produces effects opposite to what might have been expected. Who can wonder that the mighty fact which turned the black smoke of despair into bright flame should have seemed too good to be true? The little notice brings the disciples near to our experience and sympathy. Christ’s loving forbearance and condescending affording of more than sufficient evidence show how little changed He was by Death and Resurrection. He is as little changed by sitting at the right hand of God. Still He is patient with our slow hearts. Still He meets our hesitating faith with lavish assurances. Still He lets us touch Him, if not with the hand of sense, with the truer contact of spirit, and we may have as firm personal experience of the reality of His life and Presence as had that wondering company in the upper room. 
 MacLaren, A. (2009). Expositions of Holy Scripture: Luke 13–24 (pp. 373–374). Bellingham, WA: Logos Bible Software.