Sentence:  The grounds for the Church 's position are Scriptural ( Old Testament ) , the teachings of the fathers and <WSD>doctors</WSD> of the early Church , the unbroken tradition of nineteen centuries , the decisions of the highest ecclesiastical authority and the natural law . 
Meaning of the word marked with <WSD> tags:  (Roman Catholic Church) a title conferred on 33 saints who distinguished themselves through the orthodoxy of their theological teaching