Oscar Wilde quote: “He hadn’t a single redeeming vice.”

“A man must have vices, expensive ones if possible. Otherwise when he reaches old age he will have nothing to be redeemed from.”

Carlos Ruiz Zafón book The Angel's Game

Source: The Angel's Game

“The fallacy of that book is, that Mandeville defines neither vices nor benefits. He reckons among vices everything that gives pleasure. He takes the narrowest system of morality, monastick morality, which holds pleasure itself to be a vice, such as eating salt with our fish, because it makes it taste better; and he reckons wealth as a publick benefit, which is by no means always true. Pleasure of itself is not a vice.”

Bernard Mandeville (1670–1733) Anglo-Dutch writer and physician

Dr. Johnson in conversation, April 15, 1778, reported in James Boswell, The Life of Samuel Johnson, LL.D. (Oxford: Oxford University Press, 1791) p. 948.
Criticism

“Self-pity, he said, is the most demoralizing of all vices.”

Robert A. Heinlein book Friday

Source: Friday (1982), Chapter 24 (p. 244)

“Each of us has to find out for himself what is permitted and what is forbidden — forbidden for him. It's possible for one never to transgress a single law and still be a bastard. And vice versa.”

Hermann Hesse book Demian

Source: Demian (1919), p. 147
Context: Certainly you shouldn't go kill somebody or rape a girl, no! But you haven't reached the point where you can understand the actual meaning of "permitted" and "forbidden." You've only sensed part of the truth. You will feel the other part, too, you can depend on it. For instance, for about a year you have had to struggle with a drive that is stronger than any other and which is considered "forbidden." The Greeks and many other peoples, on the other hand, elevated this drive, made it divine and celebrated it in great feasts. What is forbidden, in other words, is not something eternal; it can change. Anyone can sleep with a woman as soon as he's been to a pastor with her and has married her, yet other races do it differently, even nowadays. Each of us has to find out for himself what is permitted and what is forbidden — forbidden for him. It's possible for one never to transgress a single law and still be a bastard. And vice versa. Actually it's only a question of convenience. Those who are too lazy and comfortable to think for themselves and be their own judges obey the laws. Others sense their own laws within them; things are forbidden to them that every honorable man will do any day in the year and other things are allowed to them that are generally despised. Each person must stand on his own feet.

“Vice President Cheney has been the most dangerous vice president we've had probably in American history. The idea he doesn't realize that Article I of the Constitution defines the role of the vice president of the United States, that's the Executive Branch. He works in the Executive Branch. He should understand that. Everyone should understand that. And the primary role of the vice president of the United States of America is to support the president of the United States of America, give that president his or her best judgment when sought, and as vice president, to preside over the Senate, only in a time when in fact there's a tie vote. The Constitution is explicit. The only authority the vice president has from the legislative standpoint is the vote, only when there is a tie vote. He has no authority relative to the Congress.”

Joe Biden (1942) 47th Vice President of the United States (in office from 2009 to 2017)

Biden at the 2008 Vice Presidential debate. Biden-Palin Vice Presidential debates http://edition.cnn.com/2008/POLITICS/10/02/debate.transcript/, October 2, 2008
2000s