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Relationship with James and pragmatism

Bergson travelled to London in 1908 and met there with William James, the Harvard University philosopher who was Bergson's senior by 17 years, and who was instrumental in calling Bergson's work to the attention of the Anglo-American public. The two became great friends. James's impression of Bergson is given in his Letters under the date of 4 October 1908:

So modest and unpretending a man but such a genius intellectually! I have the strongest suspicions that the tendency which he has brought to a focus, will end by prevailing, and that the present epoch will be a sort of turning point in the history of philosophy.

As early as 1880, James had contributed an article in French to the periodical La Critique philosophique, of Renouvier and Pillon, titled Le Sentiment de l'Effort. Four years later, a couple of articles by him appeared in the journal Mind: "What is an Emotion?" and "On some Omissions of Introspective Psychology". Bergson quoted the first two of these in Time and Free Will. In 1890–91 appeared the two volumes of James's monumental work The Principles of Psychology, in which he refers to a pathological phenomenon Bergson observed. Some writers, taking merely these dates into consideration and overlooking that James's investigations had been proceeding since 1870 (registered from time to time by various articles that culminated in The Principles), have mistakenly dated Bergson's ideas as earlier than James's.

William James hailed Bergson as an ally. In 1903, he wrote:

I have been re-reading Bergson's books, and nothing that I have read for years has so excited and stimulated my thoughts. I am sure that his philosophy has a great future; it breaks through old frameworks and brings things to a solution from which new crystallizations can be reached.

The most noteworthy tributes James paid to Bergson come in the Hibbert Lectures (A Pluralistic Universe), which James gave at Manchester College, Oxford, shortly after meeting Bergson in London. He remarks on the encouragement he gained from Bergson's thought, and refers to his confidence in being "able to lean on Bergson's authority".

Bergson's influence had led James "to renounce the intellectualist method and the current notion that logic is an adequate measure of what can or cannot be". It had induced him, he continued, "to give up logic, squarely and irrevocably" as a method, for he found that "reality, life, experience, concreteness, immediacy, use what word you will, exceeds our logic, overflows, and surrounds it".

These remarks, which appeared in James's book A Pluralistic Universe in 1909, impelled many English and American readers to investigate Bergson's philosophy, but no English translations of Bergson's major work had yet appeared. James encouraged and assisted Arthur Mitchell in preparing an English translation of Creative Evolution. In August 1910, James died. It was his intention, had he lived to see the translation finished, to introduce it to the English reading public by a prefatory note of appreciation. The next year, the translation was completed and still greater interest in Bergson and his work ensued. By coincidence, in that same year (1911), Bergson wrote a 16-page preface, Truth and Reality, to the French translation of James's book Pragmatism. In it, he expressed sympathetic appreciation of James's work, together with certain important reservations.

From 5 to 11 April, Bergson attended the Fourth International Congress of Philosophy held at Bologna, in Italy, where he gave an address on "Philosophical Intuition". In response to invitations he visited England in May of that year and on several subsequent occasions. These visits were well received. His speeches offered new perspectives and elucidated many passages in his three major works: Time and Free Will, Matter and Memory, and Creative Evolution. Although necessarily brief statements, they developed and enriched the ideas in his books and clarified for English audiences the fundamental principles of his philosophy.