The genuine significance of Catholic devotion to Mary is to be seen in the light of the Incarnation itself. The Church cannot separate the Son and the Mother. Because the Church conceived of the Incarnation as God’s descent into flesh and into time, and His great gift of Himself to His creatures, she also believes that the one who was closest to Him in this great mystery was the one who participated most perfectly in the gift. When a room is heated by an open flame, surely there is nothing strange in the fact that those who stand closest to the fireplace are the ones who are warmest. And when God comes into the world through the instrumentality of one of His servants, then there is nothing surprising about the fact that His chosen instrument should have the greatest and most intimate share in the divine gift.
Mary, who was empty of all egotism, free from all sin, was as pure as the glass of a very clean window that has no other function than to admit the light of the sun (Son). If we rejoice in that light, we implicitly praise the cleanness of the window. And of course it might be argued that in such a case we might well forget the window altogether. This is true. And yet the Son of God, in emptying Himself of His majestic power, having become a child, abandoning Himself in complete dependence to the loving care of a human Mother, in a certain sense draws our attention once again to her. The Light has wished to remind us of the window, because He is grateful to her and because He has an infinitely tender love, it is certainly a great grace and a privilege, and one of the most important aspects of this privilege is that it enables us to some extent to appreciate the mystery of God’s great love and respect for His creatures.
That God should assume Mary into heaven is not just a glorification of a “Mother Goddess.” Quite the contrary, it is the expression of the divine love for humanity, and a very special manifestation of God’s respect for His creatures, His desire to do honor to the beings He has made in His own image, and most particularly His respect for the body which was destined to be the temple of His glory. If Mary is believed to be assumed into heaven, it is because we too are one day, by the grace of God, to dwell where she is. If human nature is glorified in her, it is because God desires it to be glorified in us too, and it is for this reason that His Son, taking flesh, came into the world.
In all the great mystery of Mary, then, one thing remains most clear: that of herself she is nothing, and that God has for our sakes delighted to manifest His glory and His love in her.
It is because she is, of all the saints, the most perfectly poor and the most perfectly hidden, the one who has absolutely nothing whatever that she attempts to possess as her own, that she can most fully communicate to the rest of us the grace of the infinitely selfless God. And we will most truly possess Him when we have emptied ourselves and become poor and hidden as she is, resembling Him by resembling her.
And all our sanctity depends on her maternal love. The ones she desires to share the joy of her own poverty and simplicity, the ones whom she wills to be hidden as she is hidden, are the ones who share her closeness to God.
Thomas Merton