THE immense popularity which Bergson's philosophy enjoys is sometimes cast up against him, by those who do not agree with him, as a reproach. It has been suggested that Berg-son's writings are welcomed simply because they offer a theoretical justification for a tendency which is natural in all of us but against which philosophy has always fought, the tendency to throw reason overboard and just let ourselves go. Bergson is regarded by rationalists almost as a traitor to philosophy, or as a Bolshevik inciting the public to overthrow what it has taken years of painful effort to build up.