He that finds out he's changed his lot for worse, Let him betimes the untoward choice reverse: For still, when all is said, the rule stands fast, That each man's shoe be made on his own last.
I will perform the function of a whetstone, which is about to restore sharpness to iron, though itself unable to cut.
[Lat., Fungar vice cotis, acutum
Reddere quae ferrum valet, exsors ipsi secandi.]