Sentence:  The grounds for the Church 's position are Scriptural ( Old Testament ) , the teachings of the fathers and doctors of the early Church , the unbroken tradition of nineteen centuries , the decisions of the highest ecclesiastical authority and the <WSD>natural</WSD> law . 
Meaning of the word marked with <WSD> tags:  a rule or body of rules of conduct inherent in human nature and essential to or binding upon human society