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What is the difference between a sacrament and a sacramental rite
The Episcopal Church makes a distinction between the two great sacraments (baptism and Eucharist) and other sacramental rites (confirmation, holy matrimony, reconciliation of a penitent, ordination, and unction). This is because we believe that all should be baptized and receive communion, but not everyone needs to get married or be ordained, for example. The reason that baptism and Eucharist are proscribed is because they were commanded by Christ himself in the Gospels.
Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything that I have commanded you. And remember, I am with you always, to the end of the age. -Matthew 28:19-20
Then he took a loaf of bread, and when he had given thanks, he broke it and gave it to them, saying, “This is my body, which is given for you. Do this in remembrance of me.” And he did the same with the cup after supper, saying, “This cup that is poured out for you is the new covenant in my blood.” -Luke 22:19-20