Musar su Levitico 10:19

הייטב בעיני ה' . The difficulty with this verse (10,19) is that Aaron does not explain to Moses that the general rules -pertaining to who eats these parts of the sacrifices as well as when and where- do not apply in this case. Must we assume that Moses was unaware of when exceptions to the general rules apply? The answer is that Moses was certainly well aware of the validity of Aaron's argument. In this case it was the fact that he was angry which caused him to err in his interpretation of the law. In verse 16 Moses was reported as angry. When Aaron spoke to him soothingly in verse 19, Moses responded in verse 20 by acknowledging his error. The Torah is anxious to demonstrate that Moses did not need Aaron to remind him of the law. The knowledge came back to him a soon as his anger subsided. Rabbi Menachem Habavli uses this episode to point out how important it is to "keep one's cool."