But this passage teaches us something more than just that Christ instituted a special relationship between John and Mary. Bible scholars point out that John’s account of the passion and death of Christ has a very unusual, seven-fold structure. Right at the center of this seven-fold structure is the story of Christ telling John to regard Mary as his mother. As a result, something very special and very symbolic is going on here. This is something even very liberal, Protestant theologians acknowledge, and they certainly have no desire to come to conservative, Catholic conclusions about Mary. But even they recognize that something very strange and very wonderful and very symbolic is going on in this passage, they simply are not sure what it is.
The Catholic, however, is sure. The historical Catholic teaching is that in this passage St. John—the disciple whom Jesus loved—is made a symbol for every disciple, for every Christian, and that as a result every Christian is to regard Mary as his mother. This is something we could derive on other grounds. Since we are all members of Christ, and since Mary is Christ’s mother, Mary is also our mother through Christ.