“He [Hugh Trevor-Roper] knew Albert Speer well, since he interviewed him many times in prison. He always found Speer an enigma: how had such a cultivated and intelligent man come to serve the Nazis? After many long conversations, he eventually asked Speer whether, if he could have his life again, he would choose to be like his father, a respectable bourgeois architect in a provincial German town; or whether he would choose to be what he in fact became, the armaments minister of undoubtedly the most evil and destructive man in the history of Europe, if not the world. Speer, who never answered any question in a hurry, paused for a long time, looked away and frowned. Then suddenly he turned his eyes directly on his interrogator, and said simply: You have to understand the irresistible fascination of power.”
Alasdair Palmer, “The letters of Hugh Trevor-Roper”, in Standpoint, Jan. 2014, p. 76.