Simplify the following text for a Grade 7 native English-speaking person.
Original: He has written that his epiphany came in 1969 when he had a mystical experience , leading him to seek out a total of twenty-one human gurus in Taoism , Sutra , and Tantra .
Simplified: Lu has written that he had a mystical experience in 1969 . This lead him to seek out a total of twenty-one human gurus in Taoism , Sutra , and Tantra .