In the Christian tradition, there is a doctrine of special church sacraments, during which divine grace descends on a person. There are seven sacraments in Orthodoxy, one of which is the Eucharist.
The Eucharist is one of the church sacraments, during which the real essence of the Body and Blood of Christ the Savior is miraculously applied to the essence of bread and wine. This miracle occurs during the Eucharistic canon when the priest invokes the Holy Spirit on prepared gifts.
The Eucharist is the central moment of the divine liturgy. This sacrament was established by Jesus Christ Himself during the Last Supper. The Savior himself commanded us to celebrate the Eucharist in remembrance of Him. If we turn directly to the Gospel, we can read about the need for a believer to begin the sacrament of the Eucharist (communion). Thus, the Savior said that those who did not partake of their lives will not have life in themselves, because it is he who eats the Body of Christ and drinks His blood that has eternal life.
In Orthodoxy, a clear concept is given that in the Eucharist (or the communion of believers) there are real Body and Blood of Christ Himself. Therefore, the Communion is communed not only and not just divine grace, but the Lord Himself, uniting with Him. It is also worth noting that the Orthodox take communion under two forms - that is, Body and Blood. Among Catholics, the sacrament takes place under one form - only by the Body.
It is also necessary to point out that the sacrament for Protestants is not a great priesthood, but just a custom, a memory of the historical event of the Savior's last supper. Therefore, Protestants have no idea about the real presence of the essence of the Body and Blood of Christ in bread and wine.
