Sentence:  If any atheist can stake his soul for a <WSD>wager</WSD> against such an inexhaustible disproportion, let him never hereafter accuse others of credulity. 
Meaning of the word marked with <WSD> tags:  A contract by which two parties or more agree that a certain sum of money, or other thing, shall be paid or delivered to one of them, on the happening or not happening of an uncertain event.