 On the other hand, admirers such as the secular cleric Robert de Sorbon (d. 1274) noted that Beguines exhibited far more devotion to God than even the cloistered, since they voluntarily pursued a religious life without vows and walls, surrounded by the world's temptations.The power of the Beguine label is evident in the "watershed" moments of Beguine history, from its first appearance in the sermons of James of Vitry (the Beguine movement's earliest and perhaps most famous promoter), to its reference in the trial of the doomed mystic Marguerite Porete (who was burned at the stake in Paris on charges of heresy in 1310), to its centrality in the condemnation of lay religious women at the Council of Vienne in 1311–1312.Sometime during the early to mid-1290s, Marguerite Porete wrote a mystical book known as "The Mirror of Simple Souls".