Sentence:  But no Man Pities another for any Evil lying upon Him, which he "would not" help, but which he "could not". One is his Burden, the other his Choice; Vertually at least, since he might have Chosen its <WSD>Prevention</WSD>. 
Meaning of the word marked with <WSD> tags:  The act of preventing or hindering; obstruction of action, access, or approach; thwarting.