The words of Jesus recorded in the Gospel of John, specifically in the passage of John 6:51-55, hold profound significance in the Christian faith. In this scripture, Jesus proclaims, "For my flesh is true food, and my blood is true drink." These words, often referred to as the Eucharistic discourse, have sparked theological debates and discussions throughout history. This book aims to explore the depth of Jesus' teaching, delving into the meaning of his statement, the reality of the real presence of Christ in the Eucharist, and the theological implications of this belief. By understanding the biblical context and the development of Eucharistic doctrine, we can embrace the fullness of Christ's presence, body, blood, soul, and divinity in the sacrament of the Eucharist.