In this gospel reading, the cross is the New Tree of Life, the New Tree in the center of the universe. Just as the First Eve, standing next to the tree "in the middle of the garden", reached out her hand and took the fruit from that tree, which was a choice to taste independence from God - the tree representing self-sufficiency-, the Second Eve, who is Mary, standing next to the tree of the cross, through her fiat-let it be done to me according to your word -, surrendered the fruit of her womb and grafted that back onto the New Tree of Life. The First Eve brought death into the world through her own disobedience, infecting every member of the human race, the Second Eve brought life and light into the world through her own obedience and humility, affecting every member of the human race.
We live in a different world now, one that has been deified. The Second Person of the Trinity became flesh, his feet touched the earth, he entered the waters of the Jordan, he breathed the same molecules that we breathe in every day, his blood dripped from the wood of the cross onto the ground, he made matter holy by his union with it, and the Holy Spirit descended upon the Apostles, giving birth to the Church, Christ's Mystical Body. The Kingdom of God is truly within, it is immanent, in the heart of the world, hidden in the heart of each man. And all this began with Mary's absolute surrender to the will of God: let it be done to me according to your word. That Word, the Second Person of the Trinity, joined a human nature in her womb. He received his body and blood from her, and so when we receive His body and blood in the Eucharist, she becomes our Mother. We become his body, and his blood runs through our veins, and so she is really and truly our Mother. Hence, she knows us intimately, as a mother would know her own child. She does not suffer the same limitations that she did here on earth, and so she really can know each one of us, and love each one of us as if we are her only child, because she knows each one of us in the Beatific Vision. She knows us individually, but it is very important that we come to know and experience her gaze upon us, that we become aware of her knowledge of us. And we do that by praying to her and opening ourselves up to her, to her intercession, her guidance, and her concern for us.