The quotations of

Karl Popper

Austrian-British philosopher of science and social and política e falsificationism and for criticism of Plato, Hegel and Marx as totalitarian opponents of open society

1902–1994

18 quotes, most often on Science, Freedom and Thinking.

We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure.
The Open Society and Its Enemies (1945), Vol. 2, Ch. 21 “An Evaluation of the Prophecy”
- Freedom
We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant.
The Open Society and Its Enemies (1945), Vol. 1, Notes to the Chapters: Ch. 7, Note 4
- Freedom
- Politics
It is wrong to think that belief in freedom always leads to victory; we must always be prepared for it to lead to defeat. If we choose freedom, then we must be prepared to perish along with it.
On Freedom (1958)
- Freedom
The so-called paradox of freedom is the argument that freedom in the sense of absence of any constraining control must lead to very great restraint, since it makes the bully free to enslave the meek.
The Open Society and Its Enemies (1945), Vol. 1, Notes to the Chapters: Ch. 7, Note 4
- Freedom

Most quoted

People A to Z

C. S. Lewis1898–1963151 quotes

Mark Twain1835–1910151 quotes

Benjamin Franklin1706–179098 quotes

Martin Luther King Jr.1929–196884 quotes

Albert Einstein1879–195595 quotes

Dave Barryborn 1947100 quotes