“If you can't explain it simply, you don't understand it well enough.”
Other Albert Einstein Quotes
The important thing is not to stop questioning. Curiosity has its own reason for existing.
Albert Einstein 
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If you can't explain it simply, you don't understand it well enough.
Albert Einstein
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Too many of us look upon Americans as dollar chasers. This is a cruel libel, even if it is reiterated thoughtlessly by the Americans themselves.
Albert Einstein
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A person who never made a mistake never tried anything new.
Albert Einstein
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Insanity: doing the same thing over and over again and expecting different results.
Albert Einstein
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