No, he wasn't lazy in his writings, and his text is clear to the layman. No, that's a popscience myth. Hence you will not be able to quote Einstein saying that. However I can quote this at you: Please Register or Log in to view the hidden image! You're still dismissing Einstein in favour of your ersatz popscience misunderstanding of general relativity. Einstein said repeatedly that the speed of light varies with position. And he isn't the only one. See The Deflection and Delay of Light by Ned Wright and this PhysicsFAQ article by Don Koks: "Einstein talked about the speed of light changing in his new theory. In the English translation of his 1920 book "Relativity: the special and general theory" he wrote: "according to the general theory of relativity, the law of the constancy of the velocity [Einstein clearly means speed here, since velocity (a vector) is not in keeping with the rest of his sentence] of light in vacuo, which constitutes one of the two fundamental assumptions in the special theory of relativity [...] cannot claim any unlimited validity. A curvature of rays of light can only take place when the velocity [speed] of propagation of light varies with position." This difference in speeds is precisely that referred to above by ceiling and floor observers." This is wrong I'm afraid. The ascending photon speeds up, because a gravitational field is a place where the speed of light is spatially variable. General relativity is, curved space is not. Yes. It contradicts Einstein in some important respects, and is wrong. You are kidding yourself. I'm the one who refers to Einstein, you're the one who dismisses him with popscience and handwaving platitudes such as "much progress has been made since". I'm way in advance of you on SR and GR, and nobody has shown that what I've said is incorrect, because I'm correct, because Einstein's correct. And by the way, it's Nobel, not Noble.