Complex sentence: After a period of further touring, Muir departed in 1973 to quit the music industry, initially thought to have been due to an onstage injury caused by a gong landing on his foot, Muir went through a personal spiritual crisis and withdrew to become a monk.
Split into simpler sentences: After a period of further touring, Muir departed in 1973 to quit the music industry. Initially thought to have been due to an onstage injury caused by a gong landing on his foot, Muir went through a personal spiritual crisis and withdrew to become a monk.