Complex sentence: The couple were not pursuing the occult, but influenced by intelligences in the transcendental world, they became involved with spiritist circles in the beginning of the 20th century, and soon experienced some extraordinary events.
Split into simpler sentences: The couple were not pursuing the occult, but influenced by intelligences in the transcendental world. They became involved with spiritist circles in the beginning of the 20th century, and soon experienced some extraordinary events.