St. Margaret Mary was chosen to be the conduit of the Sacred Heart to the world!  She met and spoke with Our Lord personally and accepted great sufferings for love of God.  In this book, children learn:
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The sufferings in the early life of St. Margaret Mary
Her early promise to be a religious sister
Her family's pressure for her to marry
Our Lord's meetings with her
The Sacred Heart devotion, First Fridays devotion and 12 promises of Our Lord
Virtues of piety, humility, patient suffering and especially charity