WHAT THEY SAW
Matthew No mention of looking inside the tomb, just the angel telling them Jesus isn’t there and to tell the disciples that he has risen.
Mark: A young man in a long white garment stood on the right side
Luke: Two men in shining garments stood by them.
John: Mary wept and saw two angels in white where the body had been, one at the head and one at the foot.
I truncated your last post and last post.
Matthew’s account of the angel rolling away the stone probably occurred while the women were en route to the tomb, so that only the guards saw the angel sitting on the stone. John’s account of Mary Magdalene and the angels is a separate event; Mary had likely gone back to get Peter and John before the other women encountered the angels.
Clearly there were two angels, as described in Luke and John. The second angel may or may not have appeared to the guards, but did appear to the women entering the tomb. It’s likely that only one angel spoke, hence Mark only mentions one angel. While Mark and Luke refer to men instead of angels, the men are wearing white or “dazzling apparel” (ESV) and their appearance causes the women to be greatly distressed, which is consistent with Matthew and John’s descriptions of the angels (as well as other descriptions in the Bible of people encountering angels, e.g. Dan 8:15-17, Lk 1:11-12, Acts 1:10-11, 10:30).
Were the angels standing or sitting? In my harmonization above, the angels appeared when the first group of women entered the tomb and were standing, but had seated themselves when the second group entered.
WHAT THEY DID
Matthew: They had fear and joy and ran to tell the deciples
Mark: They said nothing to any man for they were afraid
Luke: They told all those things to the 11 and all the rest
John: Mary left the sepulcar before going in and ran into Simon Peter and another disciple. All three then went inside the tomb.
Matthew (28:8) and Luke (24:9) indicate that the women went and told the disciples of the empty tomb but Mark (16:8) says they were afraid and said nothing. True but in the verses that follow in the appendix to Mark’s own Gospel (Mk. 16:10) Mary Magdalene does in fact tell the apostles. Rather than conflicting with the other texts, Mark may merely supply additional detail about the startled nature of the women, that at first they were startled and said nothing but soon after went on, as Mark in fact says, a did tell the apostles.
PROBLEM: Mark says that the women returning from the empty tomb “said nothing to anyone, for they were afraid” (16:8). But Matthew asserts that they “ran to bring His disciples word” (Matt. 28:8; cf. v. 9).
SOLUTION: In response, it should be observed that Matthew does not actually say the women told the disciples, but they went back with the intention to tell them. Also, since Mark reveals that they did not speak because “they were afraid,” it may be that at first they held their peace (as Mark indicated), and then later spoke up (as Matthew may imply). It is also possible that the women left the tomb in two groups at slightly different times, Mark referring to one and Matthew to the other.