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Albert Einstein Quotes about Wisdom

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I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

Albert Einstein (2003). “Einstein's 1912 manuscript on the special theory of relativity”, George Braziller

I think that only daring speculation can lead us further and not accumulation of facts.

"Scientifically speaking: a dictionary of quotations", Volume 1, (p. 154), 2002.