„Ideas are incestuous.“

„I sell an idea, an idea in a can.“

—  Piero Manzoni Italian artist 1933 - 1963

Quote of Manzoni, (refering to his art-work in 1961 'Artist Shit'); as cited on 'Heart', in the aricle 'More about Piero Manzoni' http://www.heartmus.dk/en/about-heart/our-collection/piero-manzoni/more-about-piero-manzoni.html

„"Dangerous" does not mean exciting or bold; it means likely to cause great harm. The most dangerous idea is the only dangerous idea: The idea that ideas can be dangerous.“

—  Daniel T. Gilbert American psychologist 1957

Daniel T. Gilbert (2007) in: John Brockman. What is your dangerous idea?: today's leading thinkers on the unthinkable. Harper Perennial, 2007, p. 42

„Truth is the agreement of our ideas with the ideas of God.“

—  Jonathan Edwards Christian preacher, philosopher, and theologian 1703 - 1758

„Why is it a good idea for you and not a good idea for me?“

—  E. Lockhart, buch We Were Liars

Quelle: We Were Liars

„Christianity is an idea, and as such is indestructible and immortal, like every idea.“

—  Heinrich Heine German poet, journalist, essayist, and literary critic 1797 - 1856

History of Religion and Philosophy in Germany, Vol. I (1834)

„A person with a new idea is a crank until the idea succeeds.“

—  Mark Twain American author and humorist 1835 - 1910

„A god is the idea of a god. The idea of a god is a god.“

—  Alan Moore English writer primarily known for his work in comic books 1953

De Abaitua interview (1998)
Kontext: A god is the idea of a god. The idea of a god is a god. The idea of Glycon is Glycon, if I can enhance that idea with an anaconda and a speaking tube, fair enough. I am unlikely to start believing that this glove puppet created the universe. It’s a fiction, all gods are fiction. It’s just that I happen to think that fiction’s real. Or that it has its own reality, that is just as valid as ours. I happen to believe that most of the important things in the material world start out as fiction. That everything around us was once fiction – before there was the table there was the idea of a table, and the idea of a table before tables was fiction. This is the most important world, the world of fictional things. That’s the world where all this starts.

„An idea that is not dangerous is unworthy of being called an idea at all.“

—  Oscar Wilde Irish writer and poet 1854 - 1900

The Epigrams of Oscar Wilde, edited by Alvin Redman (1954)

„An idea that is not dangerous is not worthy of being called an idea at all.“

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

The Roycraft Dictionary and Book of Epigrams (1923)

„We want to challenge the established ideas with new ideas.“

—  Jack Layton Leader of the New Democratic Party of Canada 1950 - 2011

In his victory speech after winning the NDP leadership on the first ballot, Jan. 26, 2003.

„The idea does not belong to the soul; it is the soul that belongs to the idea.“

—  Charles Sanders Peirce American philosopher, logician, mathematician, and scientist 1839 - 1914

Vol. I, par. 216
Collected Papers (1931-1958)

„If the national park idea is the best idea America ever had, wilderness preservation is the highest refinement of that idea.“

—  Wallace Stegner American historian, writer, and environmentalist 1909 - 1993

It All Began with Conservation Smithsonian magazine, April 1990, pages 35-43

„That’s how ideas are generated. Unusual combinations, mixing old and new, stimulate original ideas, that is, ideas with origins.“

—  Will Gompertz British journalist 1965

Think Like an Artist (2015)

„A truly intelligent person welcomes new ideas, for new ideas can add to the synergy of other accumulated ideas.“

—  Robert T. Kiyosaki American finance author , investor 1947

Rich Dad Poor Dad: What the Rich Teach Their Kids About Money-That the Poor and the Middle Class Do Not!

„The idea of motherland is not a false idea, but it is a little idea, and one which must remain little.“

—  Henri Barbusse French novelist 1873 - 1935

Light (1919), Ch. XX The Cult
Kontext: The idea of motherland is not a false idea, but it is a little idea, and one which must remain little.
There is only one common good. There is only one moral duty, only one truth, and every man is the shining recipient and guardian of it. The present understanding of the idea of motherland divides all these great ideas, cuts them into pieces, specializes them within impenetrable circles. We meet as many national truths as we do nations, and as many national duties, and as many national interests and rights — and they are antagonistic to each other.

„It was a very bad idea. It was a terrible idea. It was the worst idea he had ever heard. It was irresistible.“

—  Cassandra Clare American author 1973

Quelle: The Runaway Queen

„For every good idea, expect to have five, ten, twenty wrong or useless ideas. You cannot avoid the bad ideas if you keep your imagination free. There is no spam filter for bad ideas.“

—  Martin Lewis Perl American scientist 1927 - 2014

Essay on Creativity in Science and Engineering

„No grand idea was ever born in a conference, but a lot of foolish ideas have died there.“

—  F. Scott Fitzgerald, buch The Crack-Up

Notebook E: Epigrams, Wisecracks, and Jokes http://books.google.com/books?id=NIhKY8SpAE4C&q=%22No+grand+idea+was+ever+born+in+a+conference+but+a+lot+of+foolish+ideas+have+died+there%22&pg=PA123#v=onepage
Quoted, The Crack-Up (1936)

„What rules the world is idea, because ideas define the way reality is perceived.“

—  Irving Kristol American columnist, journalist, and writer 1920 - 2009

Wall Street Journal, September 11, 1975.
1970s