Sentence:  Just as it would be utterly vain to lay natural reasons of comfort to him who hath no wit, so would it undoubtedly be frustrate to lay spiritual causes of comfort to him who hath no faith. For unless a man first believe that holy scripture is the <WSD>word of God</WSD>, and that the <WSD>word of God</WSD> is true, how can he take any comfort in that which the scripture telleth him? 
Meaning of the word marked with <WSD> tags:  the Scriptures, especially when interpreted as the work of God rather than man