Present truth can only be found in the most holy place of the heavenly sanctuary.In 1844 Ellen White and others followed Jesus into the most holy and because of that we have a church called Seventh Day Adventist.This church has unique teachings on the Sabbath,State of the Dead,3Angels message,Who anti-christ is ect...sunday keepers never followed Jesus into present truth and this is why we have a wall seperating sabbath from sunday.
Early Writeings page 40-65 puts this into a little clearer light.