Sentence:  When we see the steady and methodical inculcation into humanity of the idea of man 's worthlessness - until redeemed - the necessity of the Devil may become evident as a weapon , a weapon designed and <WSD>used</WSD> time and time again in every age to whip men into a surrender to a particular church or church-state '' . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose