Leonardo da Vinci on talking

Iron rusts from disuse; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind.

Simplicity is the ultimate sophistication.

Once you have flown, you will walk the earth with your eyes turned skywards, for there you have been, and there you long to return.

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