How do Jehovah's Witnesses preach a gospel different than the apostles?
The Watchtower has a teaching different than the apostle John wrote in chapter 6 of his Gospel. Every year at the "memorial", the Watchtower teaches emphatically that the rank-and-file must not partake, but will nevertheless enjoy eternal life. But John, quoting Jesus, says that all believers must partake if they are to share in His eternal life:
" 'I am the living bread which has come down from heaven. Anyone who eats this bread will live forever; and the bread that I shall give is my flesh, for the life of the world.'
Then the Jews started arguing with one another: 'How can this man give us his flesh to eat?' they said. Jesus replied:
'I tell you most solemnly, if you do not eat the flesh of the Son of Man and drink His blood, you will not have life in you. Anyone who does eat my flesh and drink my blood has eternal life, and I shall raise him up on the last day. For my flesh is real food, and my blood is real drink. He who eats my flesh and drinks my blood lives in me and I live in him.' "
[The Jerusalem Bible (1966).]