Sentence:  Tony's face expressed relief, and Nettie sat silent for a moment until the vicar said “It was a generous impulse, but it may have been a momentary one, while in the case of monk and <WSD>crusader</WSD> there must have been a sustaining purpose, and possibly a great abnegation, a leaving of lands and possessions.” 
Meaning of the word marked with <WSD> tags:  A fighter in the medieval Crusades.