 However, Luther did not find this life an easy one, later recalling that while he tried to live without reproach and made full use of confession, he still felt that he “was a sinner before God with an extremely disturbed conscience” (“Preface to the Complete Edition of Luther’s Latin Writings”, 1545, WA 54:185/LW 34:336), in spite of the reassurances given him by his mentor Johann von Staupitz (1468–1524), then vicar-general of the observant wing of the Augustinians. This anxiety and fear meant the Luther underwent what he termed Anfechtungen, spiritual trials or temptations, as fears about his salvation could lead him to turn against God, while in later years he felt he was struggling with the devil. Luther was further disturbed by his father’s response when attending the first Mass at which his son officiated upon being ordained in 1507: his father suggested that Luther’s vow to St Anna may have been forced out of him by the devil, causing him to break the commandment to obey one’s parents. Some commentators have speculated that these two difficult relationships with father figures are not unconnected (for a classic but controversial study, see Erikson 1958; see also Roper 2016: 48–49).