Here is an excerpt from my book concerning the harmonization
**McEvilly **St. John would seem to have concluded his Gospel at verse 31 of preceding chapter. Hence, the authenticity of this chapter has been called in question by some, who doubted whether St. John was its author, or whether it may not have emanated from the pen of some other inspired writer. But, as it has been quoted from by the Fathers, and is found in all the codices of St. John’s Gospel, it is generally believed as certain and undoubted that St. John was its author, that the entire chapter was from his pen, and that no other inspired writer had a hand in any portion of it. Some say, it was added by him by way of appendix, for special reasons, as he would seem to have closed his Gospel at verse 31, of preceding chapter. But its inspiration, whoever its author may be, no Catholic can question after the Decree of the Council of Trent, “
De Canonicis Scripturis.”
St. Augustine But it is to be considered, how the Lord could be seen bodily in Galilee. For that it was not the day of the Resurrection is manifest; for He was seen that day in Jerusalem in the beginning of the night, as Luke and John evidently agree. Nor was it in the eight following days, after which John says that the Lord appeared to His disciples, and when Thomas first saw Him, who had not seen Him on the day of the Resurrection.
For if within these eight days the eleven had seen Him on a mountain in Galilee, Thomas, who was one of the eleven, could not have seen Him first after the eight days. Unless it be said, that the eleven there spoken of were eleven out of the general body of the disciples, and not the eleven Apostles. But there is another difficulty. John having related that the Lord was seen not in the mountain, but at the sea of Tiberias, by seven who were fishing, adds, “This is now the third time that Jesus showed himself to his disciples after he was risen from the dead. [John 21:14]
So that if we understand the Lord to have been seen within those eight days by eleven of the disciples, this manifestation at the sea of Tiberias will be the fourth, and not the third, appearance. Indeed, to understand John’s account at all it must be observed, that he computes not each appearance, but each day on which Jesus appeared, though He may have appeared more than once on the same day; as He did three times on the day of His Resurrection. We are then obliged to understand that this appearance to the eleven disciples on the mountain in Galilee took place last of all.
In the four Evangelists we find in all ten distinct appearances of Our Lord after His Resurrection.
- At the sepulcher to the women.
- To the same women on their way back from the sepulcher.
- To Peter.
- To two disciples as they went into the country.
- To many together in Jerusalem;
- when Thomas was not with them.
- At the sea of Tiberias.
- At the mountain in Galilee, according to Matthew.
- To the eleven as they sat at meat, because they should not again eat with Him upon earth, related by Mark. [Mark 16:14]
- On the day of His Ascension, no longer on the earth, but raised aloft in a cloud, as related by both Mark and Luke.
But all is not written, as John confesses, for He had much conversation with them during forty days before His ascension, “being seen of them, and speaking unto them of the things pertaining to the kingdom of God.” [Acts 1:3]