EXOD415 Another example of a moral rule handled halakhically is the hallowed: "Honor thy father and thy mother" [this verse] and "You shall fear every man his mother and father" [Leviticus 19:3]. In the analysis given to these commands by the rabbis, vague admonitions were spelled out in concrete terms so that these moral concerns could be realized in the ordinary and varied situations of life. Thus, "honor" is construed as the obligation, should it be necessary, to feed, clothe, shelter, and escort one's parents, from the parents' resources when possible, but if not, from one's own resources. "Fear" is interpreted as reverence, to be expressed in not sitting in one's parent's chair and in not interrupting their conversation -- being respectful in speech and gesture, no matter how great the provocation. Parental authority is limited to the framework of the Torah. That is to say, parents need not be obeyed when their commands are contrary to the rules of the Torah. The rabbis also ruled that one did not have to follow his parent's advice in the selection of a mate. They also discuss the priorities that should obtain in honoring father, mother, and teacher. The principle was expanded to include one's older brother and the obligation to honor parents even after their death. (Sefer HaChinukh, mitzvot, 33,48, and 212.)