"The appearance of Dr. Silberstein's recent article on 'General Relativity without the Equivalence Hypothesis' encourages me to restate my own views on the subject. I am perhaps entitled to do this as my work on the subject of General Relativity was published before that of Einstein and Kottler, and appears to have been overlooked by recent writers." -- Harry Bateman
"All this was maintained by Poincare and others long before the time of Einstein, and one does injustice to truth in ascribing the discovery to him." -- Charles Nordmann
"[Einstein's] paper 'Zur Elektrodynamik bewegter Koerper' in Annalen der Physik. . . contains not a single reference to previous literature. It gives you the impression of quite a new venture. But that is, of course, as I have tried to explain, not true." -- Max Born
"In point of fact, therefore, Poincare was not only the first to enunciate the principle, but he also discovered in Lorentz's work the necessary mathematical formulation of the principle. All this happened before Einstein's paper appeared." -- G. H. Keswani
"Einstein's explanation is a dimensional disguise for Lorentz's. . . . Thus Einstein's theory is not a denial of, nor an alternative for, that of Lorentz. It is only a duplicate and disguise for it. . . . Einstein continually maintains that the theory of Lorentz is right, only he disagrees with his 'interpretation.' Is it not clear, therefore, that in this, as in other cases, Einstein's theory is merely a disguise for Lorentz's, the apparent disagreement about 'interpretation' being a matter of words only?" -- James Mackaye
"The secret to creativity is knowing how to hide your sources." -- Albert Einstein



