If you can't explain what you are doing to a nine-year-old, then either you still don't understand it very well, or it's not all that worthwile in the first place. - Albert Einstein

"If you can't explain what you are doing to a nine-year-old, then either you still don't understand it very well, or it's not all that worthwile in the first place."

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Albert Einstein

Firsts, Nine, Nine Years, Stills, Wells, Years,




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