The Eucharistic Nature of the Scriptures

St. Paul used typlogy to help the Corinthians understand the Eucharist:
 

"I do not want you to be unaware, brothers, that our ancestors were all under the cloud and all passed through the sea, and all of them were baptized into Moses in the cloud and in the sea. All ate the same spiritual food, and all drank the same spiritual drink, for they drank from a spiritual rock that followed them,^* and the rock was the Christ. Yet God was not pleased with most of them, for they were struck down in the desert." 1 Cor. 

Rocks do not generally follow us around but sit in our front yards, quite still. St. Paul was referring to the Rock that Moses struck annd water came out on two different occasions. Ex. 17:1-7, Num 20:1-11  The Book of Deuteronomy understood the rock as God's care for Israel.  

"They forsook the God who made them and scorned the Rock of their salvation...  You were unmindful of the Rock that begot you,  you forgot the God who gave you birth. Dt. 32:15-18. 

St. Paul tried to convince the Corinthians that what they did with their bodies matters and the God or gods they eat with matters also. Typology is how our imaginations about ourself and God are formed. Dr. Anthony Pagliarini discusses typlogy and "The Eucharistic Nature of the Scriptures." In the following video. In this session from the 2018 Sacramental Catechist Symposium, Dr. Anthony Pagliarini (Visiting Associate Professional Specialist, University of Notre Dame Department of Theology) offers a rich and holistic view of scriptural typology, in which the entirety of the Old Testament narrative points to and is fulfilled in Christ.