Mr. Alan Ude, whose book "The Passionate Skeptic" has been widely and deservedly praised, had intended to write a more specialized examination of my philosophy.But at the time of his death, only a small part of his article had been completed. There is an introduction in this section.Those who read this introduction thought it worthy of publication, and it is therefore printed at the end of the book. Had his article been available earlier, I would have placed it earlier in this book.But this article arrived too late, so it was impossible to do so.I advise readers to read his article first, because his article explains many things that are easily misunderstood very clearly.It is a great pity that Mr. Ude did not live long enough to finish his work.

Bertrand Russell