Still alive. ByronKatie, the most famous spiritual teacher in America, is a world-renowned best-selling author of spiritual books. According to relevant information, as of June 10, 2022, there is no news of Byron Katie's death, so Byron Katie is still alive. Byron Katie, the founder of the theory of "the difference between one thought and another", was called the spiritual innovator of 2 1 century by Time magazine and the most inspiring mentor of this era by London Times.