Sentence:  My dear Harriet, you must not <WSD>refine</WSD> too much upon this charade.—You will betray your feelings improperly, if you are too conscious and too quick, and appear to affix more meaning, or even quite all the meaning which may be affixed to it. 
Meaning of the word marked with <WSD> tags:  To improve in accuracy, delicacy, or excellence.