Functional etymology: the heart is defined as the ruling organ. The assumed etymon -κρατία does not exist in Greek except as a second element in compounds (δημο-κρατία), but it has the same shape as καρδία. From the formal point of view, the etymology relies on the lability of liquids: next to καρδία Homer has κραδίη, which has the same syllabification as -κρατία. And, next to κράτος, Homer has κάρτος, which has the same syllabification as καρδίη. This, however, is not explicit in Chrysippus' formulation, because it was supposedly known to everyone. So that, even though Chrysippus matches lemma and etymon under their familiar Attic shape καρδία and κρατία, in fact the only formal manipulation required is the change of voiceless [t] into voiced [d]. This was missed by the Et. Magnum in which is mentioned an accident, metathesis ([ar] / [ra]).