Complex sentence: Eventually, John asked to join the Carmelites as a lay brother, most especially because of his blindness, was accepted into the novitiate house in Dol in 1606, and professed vows the following year at the age of 35.
Split into simpler sentences: Eventually, John asked to join the Carmelites as a lay brother, most especially because of his blindness. He was accepted into the novitiate house in Dol in 1606, and professed vows the following year at the age of 35.