As a result, those listening questioned his meaning. Jesus then reiterated, "Amen, amen, I say to you, unless you eat the flesh of the Son of Man and drink his blood, you do not have life within you. Whoever eats my flesh and drinks my blood has eternal life, and I will raise him on the last day." (Jn 6:54 NAB)
"As a result of this, many [of] his disciples returned to their former way of life and no longer accompanied him." (Jn 6:66 NAB)
Notice when you read this chapter, Jesus did not call those disciples back and say, "No, no, what I really meant was..."
When Jesus spoke, he meant what he said. So, how do we receive the flesh and blood of Jesus that he commanded we eat?