Complex sentence: Twain believed in the power of mind over matter, and expressed admiration for Christian Science healing; members of his family had reportedly been helped by mental healing, and his daughter, Clara, became a Christian Scientist.
Split into simpler sentences: Twain believed in the power of mind over matter, and expressed admiration for Christian Science healing. Members of his family had reportedly been helped by mental healing, and his daughter, Clara, became a Christian Scientist.