Sentence:  Moreover, the modern argument in favour of the supernatural origin of the Christian religion, drawn from its <WSD>suitableness</WSD> to our needs and its divine response to our aspirations, must be admitted by every candid person resorting to it to be of exactly equal force in the mouth of a Mahometan or a fire-worshipper or an astrolater. 
Meaning of the word marked with <WSD> tags:  The state or quality of being suitable, adapted or accommodated; suitability