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Albert Einstein Quotes

Theoretical physicist · 1879–1955 · Updated 2026-10-21

Einstein's letters, interviews and essays are well documented, which makes it easy to tell a real Einstein quote from a fake one. Every quote below gives the interview or letter it comes from.

4 real Albert Einstein quotes, with sources

✓ Sourced
“Imagination is more important than knowledge.”
Albert Einstein — Interview with George Sylvester Viereck, Saturday Evening Post, 26 October 1929
✓ Sourced
“Life is like riding a bicycle. To keep your balance you must keep moving.”
Albert Einstein — Letter to his son Eduard, 5 February 1930
✓ Sourced
“The important thing is not to stop questioning. Curiosity has its own reason for existence.”
Albert Einstein — Statement to William Miller, LIFE magazine, 2 May 1955
✓ Sourced
“Try not to become a man of success, but rather try to become a man of value.”
Albert Einstein — Statement to William Miller, LIFE magazine, 2 May 1955

Famous quotes Albert Einstein never said

✗ Never said it
“In the middle of difficulty lies opportunity.”
Comes from the physicist John Wheeler's 1979 summary of Einstein's “three rules of work”. No source shows Einstein saying it.
✗ Never said it
“Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.”
The earliest attribution to Einstein is in a 1969 book by the psychotherapist Fritz Perls, 14 years after Einstein's death.

Who was Albert Einstein?

While working as a patent clerk, Einstein published four papers in 1905 that transformed physics. His general theory of relativity reshaped our understanding of space, time and gravity, and he won the 1921 Nobel Prize for explaining the photoelectric effect. Read more on Wikipedia.

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Questions

What is Albert Einstein's most famous quote?

One of the best known is “Imagination is more important than knowledge.” (Interview with George Sylvester Viereck, Saturday Evening Post, 26 October 1929)

Did Albert Einstein really say “In the middle of difficulty lies opportunity.”?

No. Comes from the physicist John Wheeler's 1979 summary of Einstein's “three rules of work”. No source shows Einstein saying it.

Did Albert Einstein really say “Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.”?

No. The earliest attribution to Einstein is in a 1969 book by the psychotherapist Fritz Perls, 14 years after Einstein's death.

Where do these Albert Einstein quotes come from?

Einstein's letters, interviews and essays are well documented, which makes it easy to tell a real Einstein quote from a fake one. Every quote below gives the interview or letter it comes from.

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