fergalmj Here is what Perplexity AI found:
St. Catherine of Siena’s **Letter T368** is addressed to **Pope Gregory XI**, and its original context is one of her characteristic exhortations urging him to be a holy, courageous, and reforming vicar of Christ.
domcentral]
domcentral.org/trad/cathletters.pdf
### Historical setting
By the time of T368 (late 1370s), Catherine had already been corresponding with Gregory for several years, pressing him to return the papacy from Avignon to Rome and to purify the Church’s leadership. This letter falls within that urgent phase when she is trying to rouse the Pope to spiritual and institutional renewal amid political turmoil in Italy and within the Church.
hts.org
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### Spiritual and rhetorical thrust
In T368 she uses strong, fiery imagery—most famously the line rendered in some translations as “If you are what you should be, you will set all of Italy ablaze!”—to tell the Pope that his own holiness and fidelity are meant to ignite the whole Church and the Christian world. She is not merely offering pious advice but calling him to a radical conversion of heart so that, as Christ’s vicar, his example will spark repentance, zeal, and reform in bishops, clergy, and laypeople alike.
[archbalt]
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