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A physicist, philosopher, humanitarian, pacifist, political agitator and cultural Zionist, Einstein was also a formidable writer, and very quotable. Because he wrote almost exclusively in German, his words have been translated into dozens of languages - though, as everyone knows, much can be lost in translation. Translators have difficulty reproducing his sentences faithfully because they inevitably need to move the words around, causing them to lose their rhythm. Moreover, some of Einstein's words have been so miserably mistranslated that one can't recognise the original. Different versions can also lead to confusion about what he actually said. Einstein, as is the case with most writers, is best read in his mother tongue. Third, [Albert Einstein] left an enormous correspondence: he seemed genuinely to like writing letters. At 17 pages, a letter to HA Lorentz, a Dutch physicist he greatly admired, is the longest I came across in the archive. Thanks to Einstein's secretaries, copies of the more formal, typewritten letters were filed away, and recipients fortunately preserved many of his informal, handwritten letters. Scholars have used them over the years as the basis for understanding Einstein's personality and behaviour and to chart the path of his scientific thinking. Typical of his humour is a letter to the captain of a ship whose crew adopted a cat and named it Einstein, in which he wrote about his own cat's reaction to the news: \"Our tomcat was very interested in the story, and even a little jealous. The reason is that his own name, Tiger, does not express, as in your case, the close kinship to the Einstein family.\" In a reply to the conservative women's group, the Daughters of the American Revolution, who protested against Einstein's visit to America in 1932 on political grounds, he deadpanned: \"Never have I experienced from the fair sex such an energetic rejection of all my advances; if it has happened, it was never from so many at once.\"