According to Albert Pike, masonry conceals its secrets from all except whom?

The particular page you quote represents Pike's ideas, not the majority of Freemasons. Even the Scottish Rite Southern Jurisdiction, who commissioned the book, stated in the introduction that readers were free to reject anything in it that they considered "False and unsound". Most present day Freemasons reject a great deal of Pike's philosophy, if they read it at all. His influence is not nearly as great as you seem to believe.