The One True Way was a religious belief among the Bajoran people. Its followers believed that once the True Way was achieved, that a new glorious existence would dawn upon them tha transcended the corporeal form.
The One True Way was the path which would be revealed to its followers when no other paths remained to be chosen. It stated that when the Celestial Temple was restored then no false beliefs would remain. The beliefs of the One True Way stated that there would come a time when there were no false Prophets or Pah-wraith and only from the True Temple would the True Prophets emerge to guide the people of Bajor. (DS9 - Millennium novel: The Fall of Terok Nor)