Mary’s spiritual motherhood means that she has given us supernatural life just as truly as our mothers have given us natural life. What our mothers do for our natural life, Mary does in the supernatural order, nourishing, protecting, increasing, and developing our life so as to bring it to maturity.
We all understand the reality of natural life, for we see it, touch it, feel it, and perceive it in all our exterior and interior activities. It is identified, so to speak, with our ego, for we are conscious of our ego only to the extent that we know ourselves to be alive. It is a wonderful reality which is so dear to ourselves that, if need be, we would sacrifice all our other worldly goods, fortune, pleasures, and ambitions, in order to save it.
Parallel to this life, faith teaches us that there is for the Christian another life, called supernatural or spiritual, or the state of grace. But as this life cannot be seen, or touched, or known directly, to many Christians it seems something vague, ethereal, indefinite; something rather negative - the abscence of serious sin; or, if something positive, an external bond of friendship between the soul and God. And yet this supernatural life is a reality far superior to any other created reality, far superior even to this natural life which is so dear to us, for the martyrs have joyously sacrificed latter for it, and we, too, must ever be ready to lose our natural life rather than lose the state of grace; this superiority is especially evident when we consider that the Son of God became incarnate and sacrificed His life to merit this life of grace for us.
But what is this supernatural life, so imperceptible and yet so precious? It is nothing else than the very life of God, the very life of Christ in us. By it, St. Peter tells us, we become “partakers of the divine nature.” (2 Peter 1:4) And St. Paul writes: “It is no longer I that live, but Christ lives in me.” (Galatians 2:20) And again: “For me to live is Chist.” (1 Corinthians 12, and elsewhere) In another place he teaches us that we form one body with Jesus Christ who is our head. (Phil. 1:21) Now, in a body, the same life animates the head and the members. Besides, even before Peter and Paul, Jesus Himself taught His disciples: “I am the vine, you are the branches. He who abides in me, and I in him, he bears much fruit.” (John 15:5) The same sap circulates in the trunk and in the branches; the same life circulates in Christ and in His disciples. And this participation in the infinite life, the eternal life of God, is communicated to us by Mary.
How does she communicate it to us?
We can answer in a word: Christ is our life. Mary has given us Christ. She has, therefore, given us our life.
Or, since it is by grace that we participate in the life of Christ, we can also say: grace is our supernatural life. Mary had merited for us and distributes to us all grace. Therefore, she gives us supernatural life.