There is, there can be, only a single universal and external truth. Because the Real exists always and can never vanish, the True exists always and can never vanish. No prophet ever reveals it for the first time, no seer discovers it. All only rediscover it. It never changes or evolves; only its form and presentation does that. But before it can manifest in our world, it must find human minds sufficiently prepared to be able to receive it and sufficiently developed to be able to comprehend and teach it.
Paul Brunton (British philosopher, mystic, traveler, and author)