LEV81 The most obvious manner (to the outside world) that an observant Jew shows the moral aspect of what he eats is his choosing not to eat certain foods based on the Torah's laws about kashrut. Just the desire to keep these laws shows a basic acceptance of God and His commandments. The specifics also demonstrate a certain level of morality, in that the animals eaten are also slaughtered in a kosher manner, the least painful way to kill an animal (Sefer Hachinuch, Mitzvah 451). The blood must be thoroughly drained and not eaten, because the blood represents the "soul" of the animal [this verse and Deut. 12:23]. Each of these details has an element of morality attached to it.