But the Holy Spirit revealed all this to Brother Masseo and he perceived great peril for Brother Rufino and sent him to see St. Francis immediately and tell him of his vision.
Upon telling Francis of his vision, our Seraphic Father kindly showed Rufino that the vision was the devil and not Christ, and therefore he should in no way consent to his suggestions. "You should also have known that he was the devil because he hardened your heart to everything that is good, for that is exactly his job," said Francis
"The next time the devil speaks to you," St. Francis said, "answer him confidently, 'Open your mouth - and I will Sh*t [empty my bowels] in it!' And let it be a sign to you that he is the devil and he will immediately go away."
When Brother Rufino did as St. Francis instructed, the devil angrily went away with such a commotion and fall of rocks around Mount Subasio that a great mass of stones hurtled down for a long while.