“The first cause of Absurd conclusions I ascribe to the want of Method;”

Plato, Phaedo

Source: Modern thinkers and present problems, (1923), p. 217-18; : Partly cited in: John Barton, " Pragmatism, systems thinking and system dynamics http://courses.daiict.ac.in/pluginfile.php/19296/mod_resource/content/1/Pragmatism%20and%20systems%20Thinking.pdf." 19th International System Dynamics Conference, Wellington, New Zealand. AusAID, 1999.
Context: Looking back over the years that have lapsed since this was written, I cannot say that James's prophecy as to the future of pragmatism has been fulfilled; but that the world, at least the world in which I have lived, has lost its first sense of the absurdity of pragmatism is undoubtedly true. No one was more bitten than I with this first feeling of the absurd, unless it was some other of my kind among those who gathered of an evening in 1896 to listen to a reading of James s now famous little essay on " The Will to Believe " the essay which, so far as James was concerned, opened the campaign for pragmatism. James had written the paper that winter as a lecture to be delivered before the Philosophical Clubs of Yale and Brown Universities, and I cannot recall what the occasion was that brought a small number of us graduate students at Harvard together to hear it re-read but I do recall that we were very much bewildered and not a little shocked by the reading.

Source: Sir William Herschel: His Life and Works (1880), Ch.4 "Life and Works" from a memoir, published (1817).
Context: It is evident that we cannot mean to affirm that the stars of the fifth, sixth, and seventh magnitudes are really smaller than those of the first, second, or third, and that we must ascribe the cause of the difference in the apparent magnitudes of the stars to a difference in their relative distances from us. On account of the great number of stars in each class, we must also allow that the stars of each succeeding magnitude, beginning with the first, are, one with another, further from us than those of the magnitude immediately preceding.

Concluí, como se conclui sempre em Filosofia, que me encontrava diante duma Causa Primaria, portanto impenetrável.
"José Matias" (1897), collected in Contos (1902); translation by Luís Marques from The Yellow Sofa & Three Portraits (1993) p. 152.

The Myth of Sisyphus (1942), An Absurd Reasoning

A comment recalled by János Plesch in János, the Story of a Doctor (1947), p. 207. Also quoted in Einstein: the Life and Times by Ronald W. Clark (1971), p. 118 http://books.google.com/books?id=6IKVA0lY6MAC&lpg=PP1&pg=PA118#v=onepage&q&f=false.
1940s
Variant: "When I examine myself and my methods of thought, I come close to the conclusion that the gift of imagination has meant more to me than my talent for absorbing absolute knowledge." From The Ultimate Quotable Einstein by Alice Calaprice (2010), p. 26 http://books.google.com/books?id=G_iziBAPXtEC&lpg=PP1&pg=PA26#v=onepage&q&f=false. This book attributes it to Einstein and the Humanities (1979) by Dennis Ryan, p. 125, but Calaprice seems to have copied it wrong, since searching "inside the book" on this book's amazon page http://www.amazon.com/Einstein-Humanities-Contributions-Dennis-Ryan/dp/0313253803 using the word "gift" shows that p. 125 actually gives the same quote as in János, the Story of a Doctor.

Source: The Next Development in Man (1948), p. 180

Source: Physics of the Impossible: A Scientific Exploration of the World of Phasers, Force Fields, Teleportation, and Time Travel