St. Gregory Palamas ca. 1296-1359
The soul of each animal not imbued with intelligence is the life of the body that it animates; it does not possess life as essence, but as activity, since here life is relative and not something in itself. Indeed, the soul of animals consists of nothing except that which is actuated by the body. Thus when the body dissolves, the soul inevitably dissolves as well. Their soul is no less mortal than their body, since everything that it is relates and refers to what is mortal. So when the body dies the soul also dies. (Topics of Natural and Theological Science and on the Moral and Ascetic Life: One Hundred and Fifty Texts, 31)
