Amen! The type of belief that you must continuously feed on Christ's body and blood in a literal sense, (transubstantiation - cannibalism) is not fine. Jesus is the Bread of Life and just as bread nourishes our physical bodies, Jesus gives and sustains eternal life to all believers. John 6:35 - "I am the bread of life. He who comes to Me shall never hunger, and he who believes in Me shall never thirst." Jesus used figurative language to emphasize these spiritual truths. John 6:63 - "It is the Spirit who gives life; the flesh profits nothing. The words that I speak to you are spirit, and they are life."What literature are you referring to? Because what I would wonder is if in that literature they dealt with the concept of being "born again". If they did, then how did they handle the concept and how did it work that one would be un-born. What little I have read in pre-reformation literature seems to be often that Jesus is the Lord and can forgive sin, which is fine, or some type of belief that you must continuously feed on Christ's body and blood in a literal sense, which is not fine.
By faith we partake of Christ, and the benefits of His bodily sacrifice on the cross and shed blood, receiving eternal life.
John 6:40 - Everyone who looks to the Son and believes in Him may have everlasting life; and I will raise him up at the last day.
John 6:54 - Whoever eats My flesh and drinks My blood has eternal life, and I will raise him up at the last day.
John 6:47 - Most assuredly, I say to you, he who believes in Me has everlasting life.
John 6:58 - He who eats this bread will live forever.
"He who believes" in Christ is equivalent to "he who eats this bread and drinks My blood" as the result is the same, eternal life.
*HERMENEUTICS*
Bread represents the "staff of life." Sustenance. That which essential to sustain life. Just as bread or sustenance is necessary to maintain physical life, Jesus is all the sustenance necessary for spiritual life.
The source of physical life is blood -- "life is in the blood." As with the bread, just as blood is the empowering or source of life physically, Jesus is all the source of spiritual life necessary.