Verified answer

They were in his pure mind.

Einstein was able to question what he'd been told.

edit: I'm dead serious. No one looks at things about which they have accepted an explanation from someone else. Once you accept a belief about something, you fail to see it. Einstein questioned popular beliefs and found some very interesting things.

If you believe what you're told, you will never discover anything. I always thought it would be a good practice to tell teenagers that there's no cure cancer, that curing it is impossible and that they must NOT, under any circumstances, do it. Being natural doubters and operating contrary to conventional "wisdom" in general, I figure we'd have the cure in about a week.

His powerful imagination and vast yearn to quench the unquenchable thirst for knowledge had allowed him to come up with the theory of relativity, the atomic bomb, and several other grand conceptions.

"Imagination is more important than knowledge." - Albert Einstein

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Working with numbers. <}:-})

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