The document summarizes the feasts and holy days commanded by God in the Old Testament law and explains how they point to and prepare for the communion instituted by Jesus. It discusses the seven feasts/convocations God commanded Israel to observe and their spiritual significance: Passover, Unleavened Bread, First Fruits, Pentecost, Trumpets, Atonement, and Tabernacles. It then explains how each of these feasts corresponds to an element or aspect of communion, such as remembrance of Christ's sacrifice, repentance from sin, resurrection, fellowship, self-examination, and anticipation of His return.