Go look at Exodus 12 if you have not read it in a while. The first 28 verses detail the instructions concerning the practice of the Passover meal.
The scope of the instructions is broad enough to reach to all generations:
“So this day shall be to you a memorial; and you shall keep it as a feast to the LORD throughout your generations. You shall keep it as a feast by an everlasting ordinance” (v.
“So you shall observe the Feast of Unleavened Bread, for on this same day I will have brought your armies out of the land of Egypt. Therefore you shall observe this day throughout your generations as an everlasting ordinance” (v.
“And it shall be, when your children say to you, ‘What do you mean by this service?’ that you shall say, ‘It is the Passover sacrifice of the LORD, who passed over the houses of the children of Israel in Egypt when He struck the Egyptians and delivered our households” (vv. 26-27a).
Notice how God has chosen to act towards His people. Be astonished, even. The Passing Over, the event that Passover commemorates, does not occur until after these instructions (vv. 29-32). What kind of God is this? He establishes a memorial before He has yet done the thing memorialized.
In the same way, also, Christ, on the night He was to be betrayed, took the bread and the cup, and established a new memorial that signified His death before He died. Christ memorializes the End of all sacrifices before He became the end. The Lord’s Supper: The New Passover.
We worship a God who establishes memorials before He brings all things to pass. Have faith, then.