Labour which is entirely good of its kind, that is to say, effective, or efficient, the Greeks called "weighable," or 
translated usually "worthy", and because thus substantial and true, they called its price 
the "honourable estimate" of it (honorarium): this word being founded on their conception of true labour as a divine thing, to be honoured with the kind of honour given to the gods: whereas the price of false labour, or of that which led away from life, was to be, not honour, but vengeance; for which they reserved another word, attributing the exaction of such price to a peculiar goddess called Tisiphone, the "requiter (or quittance-taker) of death"; a person versed in the highest branches of arithmetic, and punctual in her habits; with whom accounts current have been opened also in modern days.