Achilles and Pedasus

In Book 16 of The Iliad we get a description of the horses that pull Achilles' Chariot which Patroclus is taking into battle. Homer tells us of Xanthus and Balius, "immortal horses the gods gave to Peleus when he married silver Thetis." (16. 154-155). The description continues and eventually brings up the third and final horse that pulls Achilles' chariot, Pedasus. Pedasus was a "faultless animal, though mortal, kept pace with immortal horses" (16.161-162). Later on in the same book, Sarpedon threw a spear in an attempt to kill Patroclus but "his bright spear sliced instead through the right shoulder of Pedasus, who gave one pained, rasping whinny, then fell in the dust." (16. 501-504). I couldn't help but draw connections between Pedasus and Achilles himself. Both are mortals attempting to keep up with immortals. In other words, both are practically immortal. They can hold their own against creatures of immortality whether they be horses or gods. However, they cannot forget their mortality. It is their defining feature. Both are ALMOST immortal, it is what characterizes both, Achilles and Pedasus. Achilles' mortality is what seems to make him conflicted about fighting the Trojans. It makes him question why he's there to fight if it means giving his life. Pedasus, on the other hand, is completely defined by his mortality. Other than his place of origin in Eëtion's city, all that is briefly mentioned of Pedasus has to do with his mortality, his ability to equal the immortal horses despite his mortality, and his death. Pedasus is only remembered because of his mortality the same way Achilles is remembered for his death by ankle today.