What is the nature of the mitzvah or commandment to honor our parents?
What is a parents' obligation to their child? It's not what you might think...
תנינא להא דת"ר האב חייב בבנו למולו ולפדותו וללמדו תורה ולהשיאו אשה וללמדו אומנות וי"א אף להשיטו במים
The Gemara comments: According to this interpretation, we learn in this mishna that which the Sages taught in a baraita: A father is obligated with regard to his son to circumcise him, and to redeem him if he is a firstborn son who must be redeemed by payment to a priest, and to teach him Torah, and to marry him, and to teach him a trade. And some say: A father is also obligated to teach his son to swim.
Now the Gemara explores the limits of this mitzvah: how far must we go to honor our parents? Here we see examples of how much we must sacrifice and endure for the sake of honoring parents.
ת"ש שאלו את ר"א עד היכן כיבוד אב ואם אמר להם כדי שיטול ארנקי ויזרקנו לים בפניו ואינו מכלימו ואי אמרת משל אב מאי נפקא לי' מיניה בראוי ליורשו
Come and hear: They asked Rabbi Eliezer how far one must go in honoring his father and mother. Rabbi Eliezer said to them: Such that the father takes a purse and throw it into the sea in front of his son, and the son does not embarrass him. And if you say that the son honors him from the money of the father, what difference does it make to the son? Why would the son care if his father throws away his own purse? The Gemara answers: This is referring to a son who is fit to inherit from him. Since the son thinks that the money will eventually belong to him, he has cause for anger.
When Rav Dimi came from Eretz Yisrael to Babylonia, he said: Once Dama ben Netina was wearing a fine cloak [sirkon] of gold, and was sitting among the nobles of Rome. And his mother came to him and tore his garment from him and smacked him on the head and spat in his face, and yet he did not embarrass her.
תני אבימי בריה דרבי אבהו יש מאכיל לאביו פסיוני וטורדו מן העולם ויש מטחינו בריחים
Avimi, son of Rabbi Abbahu, taught: There is a type of son who feeds his father pheasant [pasyonei] and yet this behavior causes him to be removed from the World, i.e., the World-to-Come; and there is one who makes him grind with a millstone, which is difficult work, and this action brings him to the life of the world to come.
The Gemara acknowledges that while honoring your parents is difficult, some people can go overboard. This is not a matter about which to be arrogant or boastful.
Sometimes it is difficult or even impossible to honor our parents due to the circumstances. Here the Gemara brings up such cases: of orphans, parents with dementia, and parents whose honor requires particular demands.
רבי יוחנן כי עברתו אמו מת אביו ילדתו מתה אמו וכן אביי איני והאמר אביי אמרה לי אם ההיא מרבינתיה הואי
The Gemara relates that Rabbi Yoḥanan himself never saw his parents. When his mother was pregnant with him, his father died; and when she gave birth to him, his mother died. And the same is true of Abaye. The Gemara asks: Is that so, that Abaye never saw his mother? But didn’t Abaye say on many occasions: My mother told me? The Gemara answers: That mother was actually his foster mother, not his birth mother.
Rav Ya’akov bar Avuh said to Abaye: With regard to one such as I, so beloved by my parents that before I return from the study hall my father brings me a cup and my mother pours for me, how should I act? Is it disrespectful to accept this honor from them? Abaye said to him: Accept it from your mother, but do not accept it from your father, as, since he is a Torah scholar he will be disheartened if his son does not show him the proper level of respect.