“it is not difficult to understand why the general principle of relativity (on the basis of the equivalence principle) has led to a theory of gravitation.”
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Probable attribution
A source trail connects this quotation to Albert Einstein and Out of My Later Years: The Scientist, Philosopher, and Man Portrayed Through His Own Words, but the exact English wording has not been confirmed in a primary text. The attribution is therefore probable rather than definitive.
Likely origin: Out of My Later Years: The Scientist, Philosopher, and Man Portrayed Through His Own Words
About this quote
This page records the wording "it is not difficult to understand why the general principle…," which centers on difficult, understand, general. A concrete trail points toward Einstein, but the exact English form remains unconfirmed; the page therefore labels it as attributed to him while preserving its science and education context.
When to use it
- Use "it is not difficult to understand why the general principle…" in a science discussion, then ask which concrete claim the wording makes.
- Compare its treatment of difficult with understand in a lesson, essay, or editorial note before drawing a conclusion.
- Before sharing it as Einstein's exact words, display the attribution caveat and follow the evidence link recorded on the page.