"Of all the books that I have written, it has always seemed to me that The Conquest of Happiness has done the most good. This has always surprised me, since it was merely an attempt to apply commonsense to everyday ethical problems. It is perhaps one of the major tragedies of our century that so many people are imprisoned in conventional dogma and so are unable to discuss their problems with each other. Freedom of thought often seems a right that is almost physically impossible to deny, but every person who speaks or writes in the phraseology of political and religious dogma helps to destroy this freedom."