“Progress has always been achieved by probing well-entrenched and well-founded forms of life with unpopular and unfounded values. This is how man gradually freed himself from fear and from the tyranny of unexamined systems.”

“A scientist, an artist, a citizen is not like a child who needs papa methodology and mama rationality to give him security and direction; he can take care of himself, for he is the inventor not only of laws, theories, pictures, plays, forms of music, ways of dealing with his fellow man, institutions but also of entire world views, he is the inventor of entire forms of life.”

“All religions are good 'in principle' - but unfortunately this abstract Good has only rarely prevented their practitioners from behaving like bastards.”

“The only principle that does not inhibit progress is: anything goes.”

“Without a constant misuse of language there cannot be any discovery, any progress”

“Science is essentially an anarchic enterprise: theoretical anarchism is more humanitarian and more likely to encourage progress than its law-and-order alternatives.”

“Teachers' using grades and the fear of failure mould the brains of the young until they have lost every ounce of imagination they might once have possessed.”