It is always important in matters of high politics to know what you do not know. Those who think they know, but are mistaken, and act upon their mistakes, are the most dangerous people to have in charge.

Statecraft: Strategies for a Changing World (2002)

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More from Margaret Thatcher

Where there is discord, may we bring harmony. Where there is error, may we bring truth. Where there is doubt, may we bring faith. And where there is despair, may we bring hope.

Statement on the doorstep of 10 Downing Street, after her election as Prime Minister (1979)

I can’t bear Britain in decline. I just can’t.

Interviewed by Michael Cockerell for BBC TV's Campaign '79 (27 April, 1979).

In politics, if you want anything said, ask a man; if you want anything done, ask a woman.

Evening News newspaper of May 20, 1965. See also Quote Investigator.

You may have to fight a battle more than once to win it.

Being in power is like being a lady. If you have to tell people you are, you aren’t.

attributed - unconfirmed.
This quote is attributed / unsourced.