“Luxury, nowadays, is ruinous. We criticize, but must conform, and superfluities in the end deprive us of necessities.”

1900s, "The Study of Mathematics" (November 1907)

Letter to Churchill, dated 16/1/1912, quoted in The World Crisis, Vol 1, 1911-14 (1923), Churchill, Thornton Butterworth (London), p. 139.
Context: The luxuries of the present are the necessities of the future.  Our grandfathers never had a bath-room....

Source: The Secret Agent (1907), Ch. 2

Source: Freedom, Loyalty, Dissent (1954), p. 153

Source: Disrupt You! (2015), p.64

Source: Point Counter Point (1928), Ch. 17
Context: Ever since his mother’s second marriage Spandrell had always perversely made the worst of things, chosen the worst course, deliberately encouraged his own worst tendencies. It was with debauchery that he distracted his endless leisures. He was taking his revenge on her... He was spiting her, spiting himself, spiting God. He hoped there was a hell for him to go to and regretted his inability to believe in its existence.... it was even exciting in those early days to know that one was doing something bad and wrong. But there is in debauchery something so intrinsically dull, something so absolutely and hopelessly dismal, that it is only the rarest beings, gifted with much less than the usual amount of intelligence and much more than the usual intensity of appetite, who can go on actively enjoying a regular course of vice or continue actively to believe in its wickedness. Most habitual debauchees are debauchees not because they enjoy debauchery, but because they are uncomfortable when deprived of it. Habit converts luxurious enjoyments into dull and daily necessities.

Niklaus Wirth (1997) " A Few Words with Niklaus Wirth http://www.eptacom.net/pubblicazioni/pub_eng/wirth.html". Dr Carlo Pescio eds. June 1997.