Many true believers are quite willing to accept the artifacts of modern times, but they are unwilling to shed the world view "facts" of long gone times.
But a better analysis than this little sentence is expressed by the man who wrote
...[The true believer is] the mortal enemy of things-as-they-are and he insists on sacrificing himself for a dream that is impossible to attain....He is today everywhere on the march."
The author is Eric Hoffer and the quote is from his 1951 "The True Believer".
