„It seemed the world was divided into good and bad people. The good ones slept better… while the bad ones seemed to enjoy the waking hours much more.“

„It is absurd to divide people into good and bad. People are either charming or tedious.“

—  Oscar Wilde, Lady Windermere's Fan

Lord Darlington, Act I
Fonte: Lady Windermere's Fan (1892)

„I believe more in the goodness of bad people than i do in the badness of good people.“

—  Elbert Hubbard American writer, publisher, artist, and philosopher fue el escritor del jarron azul 1856 - 1915

p. 18.

„It's wrong to hurt even bad people. Because they don't know any better, and because bad people sometimes become good.“

—  Khaled Hosseini, livro The Kite Runner

Fonte: The Kite Runner

„Instead of the world being divided up into Catholics and Protestants or Republicans and Democrats or white men and black men or even men and women, I saw the world divided into people who had slept with somebody and people who hadn't, and this seemed the only really significant difference between one person and another.“

—  Sylvia Plath, livro The Bell Jar

Fonte: The Bell Jar (1963), Ch. 7
Contexto: Instead of the world being divided up into Catholics and Protestants or Republicans and Democrats or white men and black men or even men and women, I saw the world divided into people who had slept with somebody and people who hadn't, and this seemed the only really significant difference between one person and another. I thought a spectacular change would come over me the day I crossed the boundary line.

„Associate yourself with people of good quality, for it is better to be alone than in bad company.“

—  Booker T. Washington African-American educator, author, orator, and advisor 1856 - 1915

"Associate yourself with Men of good Quality if you Esteem your own Reputation; for 'tis better to be alone than in bad Company." This was a French maxim, late 16th century, as quoted by George Washington in his "Rules of Civility and Decent Behaviour in Company and Conversation," Rule # 56 (ca. 1744) http://gwpapers.virginia.edu/documents/civility/transcript.html
Misattributed

„If one plays good music, people don't listen, and if one plays bad music people don't talk.“

—  Oscar Wilde, The Importance of Being Earnest

Algernon, Act I.
Fonte: The Importance of Being Earnest (1895)
Contexto: Of course the music is a great difficulty. You see, if one plays good music, people don't listen, and if one plays bad music people don't talk.

„Good people are only half as good, and bad people only half as bad, as other people regard them.“

—  Elbert Hubbard American writer, publisher, artist, and philosopher fue el escritor del jarron azul 1856 - 1915

„God does not intend people, and does not like people, to be too good. He likes them neither too good nor too bad, but a little too bad is more venial with him than a little too good.“

—  Samuel Butler novelist 1835 - 1902

Vice and Virtue, iii
The Note-Books of Samuel Butler (1912), Part II - Elementary Morality

„The world is full of good people who do bad things!“

—  Agatha Christie English mystery and detective writer 1890 - 1976

„I know the smartest negotiators in the world. I know the good ones. I know the bad ones. I know the overrated ones.“

—  Donald J. Trump 45th President of the United States of America 1946

2010s, 2015, Presidential Bid Announcement (June 16, 2015)

„One might think you knew all about witches, to hear you chatter. But your words prove you to be very ignorant of the subject. You may find good people and bad people in the world; and so, I suppose, you may find good witches and bad witches.“

—  L. Frank Baum Children's writer, editor, journalist, screenwriter 1856 - 1919

"The Witchcraft of Mary-Marie", in Baum's American Fairy Tales (1908)
Short stories
Contexto: "But what can I do?" cried she, spreading out her arms helplessly. "I can not hew down trees, as my father used; and in all this end of the king's domain there is nothing else to be done. For there are so many shepherds that no more are needed, and so many tillers of the soil that no more can find employment. Ah, I have tried; hut no one wants a weak girl like me."
"Why don't you become a witch?" asked the man.
"Me!" gasped Mary-Marie, amazed. "A witch!"
"Why not?” he inquired, as if surprised.
"Well," said the girl, laughing. "I'm not old enough. Witches, you know, are withered dried-up old hags."
"Oh, not at all!" returned the stranger.
"And they sell their souls to Satan, in return for a knowledge of witchcraft," continued Mary-Marie more seriously.
"Stuff and nonsense!" cried the stranger angrily.
“And all the enjoyment they get in life is riding broomsticks through the air on dark nights," declared the girl.
"Well, well, well!" said the old man in an astonished tone. "One might think you knew all about witches, to hear you chatter. But your words prove you to be very ignorant of the subject. You may find good people and bad people in the world; and so, I suppose, you may find good witches and bad witches. But I must confess most of the witches I have known were very respectable, indeed, and famous for their kind actions."
"Oh. I'd like to be that kind of witch!" said Mary-Marie, clasping her hands earnestly.

„Aha! The Alien Planet Canada series, where the planet the characters are marooned on seems to be Manitoba. Bad bad world building.“

—  James Nicoll Canadian fiction reviewer 1961

ibid.: About Genellan: Planetfall by Scott Gier:
2000s

„One has to be a lowbrow, a bit of a murderer, to be a politician, ready and willing to see people sacrificed, slaughtered, for the sake of an idea, whether a good one or a bad one.“

—  Henry Miller American novelist 1891 - 1980

„If no one gambled against the grain in good times, there would be no winners to inspire people in the bad times.“

—  Aaron C. Brown American financial analyst 1956

Fonte: The Poker Face of Wall Street (2006), Chapter 4, A Brief History of Risk Denial, p. 81

„Here people was once used to be honourable: now they are all bad; they have kept one goodness: that they are greatest boozers.“

—  Marco Polo Venetian explorer and merchant noted for travel to central and eastern Asia 1254 - 1324

„We do not live in a world that mainly suffers bad policies due to lack of ideas about better ones, or lack of elegant explanations supporting good policies, but one that suffers bad policies due to system and meta-system level incentives.“

—  Patri Friedman American libertarian activist and theorist of political economy 1976

in Public Choice Ignorance Everywhere http://athousandnations.com/2010/11/09/public-choice-ignorance-everywhere/, November 2010

„A good cause can become bad if we fight for it with means that are indiscriminately murderous. A bad cause can become good if enough people fight for it in a spirit of comradeship and self-sacrifice. In the end it is how you fight, as much as why you fight, that makes your cause good or bad.“

—  Freeman Dyson theoretical physicist and mathematician 1923

Disturbing the Universe (1979)
Contexto: A good cause can become bad if we fight for it with means that are indiscriminately murderous. A bad cause can become good if enough people fight for it in a spirit of comradeship and self-sacrifice. In the end it is how you fight, as much as why you fight, that makes your cause good or bad. <!-- Pt. 1, Ch. 4

„The liberal conceives of men as imperfect beings. He regards the problem of social organization to be as much a negative problem of preventing 'bad' people from doing harm as of enabling 'good' people to do good; and, of course, 'bad' and 'good' people may be the same people, depending on who is judging them.“

—  Milton Friedman, livro Capitalism and Freedom

Fonte: Capitalism and Freedom (1962), Ch. 1 The Relation Between Economic Freedom and Political Freedom, p. 12

„Who and what we surround ourselves with is who and what we become. In the midst of good people, it is easy to be good. in the midst of bad people, it is easy to be bad.“

—  Karen Marie Moning author 1964

Fonte: Iced