Complex sentence: At the age of nineteen he joined Sarov Monastery as a novice, and at twenty-seven he took monstic vows and was given the name Seraphim, which means "fiery" or "burning" in Hebrew.
Split into simpler sentences: At the age of nineteen he joined Sarov Monastery as a novice. At twenty-seven he took his monastic vows and was given the name Seraphim, which means "fiery" or "burning" in Hebrew.