Our Lady of Mercy takes a special place in the school of St. Faustina’s spirituality. Sister Faustina took the devotion to Our Lady from family home, but in her religious life it deepened significantly. It was fostered not only by the spirituality of the Congregation, whose main Patroness is Our Lady of Mercy, but also by a very personal contact with Mary. In numerous apparitions, visions, meetings Mary revealed to Sister Faustina the mystery of the Divine Mercy in her life, she taught her, strengthened, accompanied in her prophetic mission. “I am your Mother by God’s unfathomed mercy” (Diary 449), said Mary, “I am not only the Queen of Heaven, but also the Mother of Mercy and your mother, too” (Diary 330).
For Sister Faustina, Mary was above all the Mother of God’s Son – Mercy Incarnate and out of God’s mercy also the mother of every man. As a careful and the best mother and the Mistress of spiritual life, she taught her the contemplation of God in her soul, obedience to the will of God, the art of love of the cross and care for these virtues, which condition the attitude of trust in God and mercy towards neighbours. „I saw Our Lady – Sister Faustina noted – who said, ‘O, how God likes the soul that faithfully follows the inspiration of His grace. I gave the world its Saviour, and you are to tell the world of His great mercy and prepare the world for His second coming, when He will come not as a merciful Saviour, but as a just Judge. O, that day is terrible. The day of judgement has been determined, the day of God’s anger, the angels tremble at the thought of it. Tell souls of His great mercy, while there is still time for mercy; if you should remain silent now, you shall be held responsible on that terrible day for a great number of souls. Do not be afraid of anything, be faithful right unto the end. I feel compassion for you’.” (Diary 635).
When the Congregation chose Mary for the Heavenly Superior General (15 August 1937), Sister Faustina envisioned all sisters covered by Her coat and heard the words of a great promise, “’Every one of you who perseveres in zeal until death in My Congregation shall evade the fire of Purgatory; and I want each of you to be characterised by the virtues of humility and meekness, chastity and love of God and neighbour, compassion and mercy.” After those words, the Congregation vanished from the vision, and I was left on my own with the Blessed Mother, Who instructed me on the will of God, how to apply it in my life, submitting entirely to His most holy erdicts. You cannot please God unless you do His will. ‘Daughter of Mine, I advise you most earnestly to do all that God asks of you, for that is most pleasing in His holy eyes. I dearly want you to distinguish yourself in your faithfulness in doing the will of God. Put the will of God above all other offerings and whole-burnt sacrifices.’ As my Heavenly Mother was speaking to me, a deep understanding of the will of God entered my soul” (Diary 1244).