Luke indeed informs us, and it is from him we learn, that Jesus first sent angels to those seeking him in the tomb; later, when the disciples were talking about him on the road, he did, in fact, appear to them, but they did not recognize him; it was after his taking the time to exhort them that he showed himself to them in the breaking of the bread and they recognized him. At last, entering suddenly, he showed himself so they could not only recognize him but even touch him. Up to this point the disciples' hearts were still weak as regards their perception of so deep a mystery; therefore, the Lord had arranged to guide them little by little, so that they should seek and find, grown strong by the finding, and in this way hold fast to what they had learned. We are led to the knowledge of eternity not quickly but by gradually adding to the words and concepts as though by short steps, and we are told spiritually that something happened one day in God's sight and that he who is timeless even perceived time." pg. 146,147 Gregory the Great "Moral Reflections on the Book of Job"
" And they told what things were done in the way, and how he was known of them in breaking of bread.
 And as they thus spake, Jesus himself stood in the midst of them, and saith unto them, Peace be unto you.
 But they were terrified and affrighted, and supposed that they had seen a spirit.
 And he said unto them, Why are ye troubled? and why do thoughts arise in your hearts?
 Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have.
 And when he had thus spoken, he shewed them his hands and his feet.
 And while they yet believed not for joy, and wondered, he said unto them, Have ye here any meat?
 And they gave him a piece of a broiled fish, and of an honeycomb.
 And he took it, and did eat before them.
 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.
 Then opened he their understanding, that they might understand the scriptures,
 And said unto them, Thus it is written, and thus it behoved Christ to suffer, and to rise from the dead the third day:
 And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
 And ye are witnesses of these things.
 And, behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high.
 And he led them out as far as to Bethany, and he lifted up his hands, and blessed them.
 And it came to pass, while he blessed them, he was parted from them, and carried up into heaven.
 And they worshipped him, and returned to Jerusalem with great joy:
 And were continually in the temple, praising and blessing God. Amen." Luke 24:35-53