Complex sentence: He was a pastor and spiritual father of high reputation and a reputed wonderworker to whom was attributed great powers of prophecy, clairvoyance and healing, and he is often referred to simply as "St. John the Wonderworker".
Split into simpler sentences: He was a pastor and spiritual father of high reputation and a reputed wonderworker to whom were attributed great powers of prophecy, clairvoyance and healing. He is often referred to simply as "St. John the Wonderworker".