"The theoretical idea ... does not arise apart from and independent of experience; nor can it be derived from experience by a purely logical procedure. It is produced by a creative act. Once a theoretical idea has been acquired, one does well to hold fast to it until it leads to an untenable conclusion."

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Source: Albert Einstein (1995). “Ideas and Opinions”, Three Rivers Press

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Albert Einstein

Physicist

Albert Einstein was a theoretical physicist known for developing the theory of relativity, which transformed our understanding of space, time, and energy.

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