Sentence:  The leader Montgomery envisages will need to discipline himself , lead a carefully regulated and orderly life , allow time for quiet thought and reflection , adapt decisions and plans to <WSD>changing</WSD> situations , be ruthless , particularly with inefficiency , and be honest and morally proper . 
Meaning of the word marked with <WSD> tags:  become different in some particular way, without permanently losing one's or its former characteristics or essence