Let The Spirit Of God Speak, Not You

Francis was due to preach before the pope and the cardinals on one occasion and at the suggestion of the bishop of Ostia he learned a carefully prepared sermon by heart. But when he stood before them all to deliver his edifying message, his mind went blank and he could not remember a word. He told them what had happened quite humbly and invoked the aid of the Holy Spirit. Then his tongue was suddenly unloosed and he spoke so eloquently that he moves the hearts of his exalted listeners to such sorrow, and it was clear that it was the Spirit of God who spoke, not he.

Saint Francis of Assisi
Bonaventure, Major Life
Chapter XII

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