Simplify the following text for a Grade 14 native English-speaking person.
Original: He frequented Spiritism during his exile ( where he participated also in many sÃ ances conducted by Madame Delphine de Girardin ) , and in later years settled into a Rationalist Deism similar to that espoused by Voltaire .
Simplified: He dabbled in Spiritualism during his exile ( where he participated also in seances ) , and in later years settled into a Rationalist Deism similar to that espoused by Voltaire .