Karl Popper on talking

We must plan for freedom, and not only for security, if for no other reason than that only freedom can make security secure.

The game of science is, in principle, without end. He who decides one day that scientific statements do not call for any further test, and that they can be regarded as finally verified, retires from the game.

Scientists try to eliminate their false theories, they try to let them die in their stead. The believer⁠—whether animal or man⁠—perishes with his false beliefs.

A great many of those who ‘debunk’ traditional…values have in the background values of their own which they believe to be immune from the debunking process.

C. S. Lewis1898–1963The Abolition of Man

• Debate

It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.

Mark Twain1835–1910

If A is a success in life, than A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut.

Albert Einstein1879–1955

• Success