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He spent the next 30 years going about Italy, founding monasteries and hermitages. He longed to give his life to Christ in martyrdom, and got the pope’s permission to preach the gospel in Hungary. But he was struck with illness as soon as he arrived, and the illness recurred as often as he tried to proceed.

During another period of his life, he suffered great spiritual dryness. One day as he was praying Psalm 31 (“I will give you understanding and I will instruct you”), he was given an extraordinary light and spirit which never left him.

At the next monastery where he stayed, he was accused of a scandalous crime by a young nobleman he had rebuked for a dissolute life. Amazingly, his fellow monks believed the accusation. He was...