This is one of the most amazing stories I have ever heard about the power of prayer. I found it on Spiritual Motherhood for Priests blog. I dare you not to get goosebumps!
This is one of the most inspiring stories from the booklet, Adoration, Reparation, Spiritual Motherhood for Priests. A miraculous story of spiritual motherhood:
We all have the prayers and sacrifices of others to thank for what we are and for our vocations. In the case of the famous Bishop Ketteler, one of the leading figures of the German episcopate in the 19th century and one of the prominent founders of Catholic sociology, he owed his gratitude to a simple nun, the lowest and poorest lay sister in the convent.
The year was 1869 and a German diocesan bishop was sitting together with his guest, Bishop Ketteler from Mainz. In the course of their conversation, the diocesan bishop came to the topic of his guest’s extremely blessed apostolate. Yet, Bishop Ketteler explained to his host,
"I owe thanks for everything that I have accomplished with God’s help, to the prayer and sacrifice of someone I do not even know. I can only say that I know somebody has offered his or her whole life to our loving God for me, and I have this sacrifice to thank that I even became a priest."