Complex sentence: Mendoza then goes on to take vows of poverty, chastity and obedience and become a Jesuit under Father Gabriel, and in time is accepted by the same Indians he used to kidnap.
Split into simpler sentences: Mendoza then goes on to take vows of poverty, chastity and obedience and becomes a Jesuit under Father Gabriel. In time, he is accepted by the very tribe of Indians he used to kidnap.