For example, one may make it his maxim to let no injury pass unrevenged, and yet he may see that this is not a practical law, but only his own maxim; that, on the contrary, regarded as being in one and the same maxim a rule for the will of every rational being, it must contradict itself.
Adibidez, norbaitek honakoa bere maxima bihur dezake, alegia, ezein isekarik ez jasatea mendekurik hartu gabe, eta hala ere, aldi berean, uler dezake hori ez dela lege praktikoa, baizik eta bere maxima besterik ez, zerizan arrazoidun ororen nahimenaren erregela gisa bere buruarekin ezin ados jar daitekeena maxima bat eta bakarrean.