"She couldn't be a "co-redemptress"."
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John 6:40 "For my Father's will is that everyone who looks to the Son and believes in him shall have eternal life, and I will raise him up at the last day."
Scripture repeats key issues over and over. Mary is a minor figure in SCRIPTURE only being mentioned half a dozen times.
In the above passage I don't see JESUS teaching us to pray to Mary or seek her for salvation.