Now, in verse 22, “And when He had said this, He breathed on them and said to them, ‘Receive the Holy Spirit’.” Now, not only does He commission them, what does He do? He empowers them to fulfill that which they need to do. Without the Holy Spirit they would not be able to fulfill the commission, but now He empowers them.
Now, going back to the Sabbath in the Old Testament, the Sabbath was given, in the Hebrew Bible, as a day for physical rest and reflection and refreshment, both for men and for their animals.
So, He could manifest Himself, even in another form to those two disciples, as it tells us in another Gospel. In His resurrection body, He is capable of manifesting in any form He wishes because, in a very real way, that resurrection body is far more awesome than we might suppose.
Now, only a few weeks later, after the resurrection, there they are preaching boldly, in the very city of the resurrection. Paul makes it clear, in Romans chapter one that this is also the foundation of the Christian message.
But one of the soldiers pierced His side with a spear, and immediately blood and water came out.” Now, if we turn to Zechariah chapter 12, we see in verse ten, “I will pour out on the house of David and on the inhabitants of Jerusalem, the Spirit of grace and of supplication, so that they will look on Me whom they have pierced; and they will mourn for Him, as one mourns for an only son, and they will weep bitterly over Him, like the bitter weeping over a firstborn.”