20. We observe that the day of the Passion is marked out as a fast, for the lamb is to be slain at the evening: though we might understand by evening the last time, according to John who says, _Children, it is the last time_. But even according to the mystery, it is plain that it was killed in the evening, when darkness immediately took place, and true fasting is to be observed on that day, for _thus shall ye eat it with anxiety_: but anxiety belongs to those who fast. But on the day of the Resurrection there is the exultation of refreshment and joy, on which day the people appears to have gone out of Egypt, when the first-born of the Egyptians had been killed. And this is shewn more evidently by what follows, wherein the Scripture says, that after the Jews kept the Passover as Moses ordered, _It came to pass that at midnight the Lord smote all the first-born in the land of Egypt from the first-born of Pharaoh. And Pharaoh called for Moses and Aaron by night, and said, Rise up, and get you forth from among my people, both ye and the children of Israel, and go serve the Lord. And the Egyptians were urgent upon the people, that they might send them out of the land in haste._ Eventually the Israelites went in such manner, that they had not opportunity to leaven their dough, for the Egyptians thrust them out, and would not wait for them to take the preparation they had made for themselves for the way. Sidenote: 1 Cor. x. 2. 21. We have made it clear then that the day of the Resurrection ought to be observed after the day of the Passion, and that this day of the Resurrection ought not to be on the fourteenth moon, but later, as the Old Testament says, because the day of the Resurrection is that on which the people going out of Egypt, after being _baptized_, as the Apostle says, _in the sea and in the cloud_, overcame death, receiving spiritual bread, and drinking spiritual drink from the rock: and further that the Lord’s Passion cannot be celebrated on the Lord’s day, and that if the fourteenth moon should fall upon the Lord’s day, that another week ought to be added, as was done in the seventy sixth year[140] of the era of Diocletian. For then without any doubt or hesitation on the part of our fathers we celebrated Easter Sunday on the twenty-eighth day of the month Pharmuthi, which is the 23rd of April. And both the course of the moon and the reason of the case concur in recommending this, for next Easter is to be kept on the twenty first moon, for to that day its range has commonly extended. Sidenote: Col. iv. 3. Sidenote: Ps. cxli. 3. Sidenote: 1 Cor. v. 8.