The Eucharist is a sacrament that contains the whole body of Jesus: his blood, body and soul, and the way of God in him, covered by the form of bread and wine. On Holy Thursday, before his suffering, Jesus created the Eucharist. When the bread and wine became the body and blood of Jesus, Jesus told his disciples to continue doing so; when the consecration is made, we see only the form of the remaining bread and wine, but it is already the body and blood of Jesus. Those who receive the Eucharist eat the whole body and blood of Jesus. Those who are well prepared before the Eucharist receive grace, which is due to the fact that they must be purified by penance, fasting for an hour before receiving...