Now, as all determining principles of the will, except the law of pure practical reason alone (the moral law), are all empirical and, therefore, as such, belong to the principle of happiness, they must all be kept apart from the supreme principle of morality and never be incorporated with it as a condition; since this would be to destroy all moral worth just as much as any empirical admixture with geometrical principles would destroy the certainty of mathematical evidence, which in Plato's opinion is the most excellent thing in mathematics, even surpassing their utility.
Nahimenaren determinazio-oinarri denak, salbu arrazoimen-lege praktiko huts bakarra (morala), orotara enpirikoak direnez, halakoak diren aldetik, beraz, zoriontasunaren printzipioan kokatzen direnak, orduan horiek denak oinarrizko esakune etiko gorenetik baztertu behar dira, eta hartan ezin dira onartu baldintza gisa, zeren horrek balio etiko oro ezabatuko bailuke, nahasketa enpirikoak oinarrizko esakune geometrikoei nabaritasun matematiko oro ezabatuko liekeen bezala, matematikak bere baitan duen gauza bikainena (Platonen arabera), eta haren erabilgarritasun ororen aurretik doana.