““Albert Einstein was certainly the most important physicist of the twentieth century. Perhaps his greatest work was his discovery of general relativity, which is the best theory we have so far of space, time, motion, and gravitation. His profound insight was that gravity and motion are intimately related to each other and to the geometry of space and time. This idea broke with hundreds of years of thinking about the nature of space and time, which until then had been viewed as fixed and absolute. Being eternal and unchanging, they provided a background, which we used to define notions like position and energy.””
![“Einstein, my upset stomach hates your theory [of General Relativity]—it…” quote by Paul Ehrenfest](https://sms4smile.com/quotes/img-quotes/8bf/paul-ehrenfest-52330_answers_einstein-my-upset-stomach-hates-your-the_467759.jpg)
