Rav Nachman and the Revi’is of Wine
Rav Nachman praises one of Shmuel’s teachings and dismisses another about wine, and Rava rebukes him: one may not call some Torah nice and some not.
Rav Yehudah said in the name of Shmuel: It suffices if a renter of the gentile contributes towards the eiruv. Rav Nachman commented: This is a superb teaching!
The Gemara then quotes another statement that Rav Yehudah said in the name of Shmuel: One who drinks a revi’is of wine may not give halachic rulings.
Rav Nachman commented: This is not a good teaching. My mind is not clear until I drink a revi’is!
Whereupon Rava rebuked Rav Nachman: It is not proper to say what you have said.
To support his rebuke, he quoted Rebbe Acha bar Chanina: “V’ro’eh zonos ye’abed hon”—if one says that some teachings are nice and others are not, he will lose the glory of Torah. Rashi explains that the word zonos in this instance is shorthand for zoo na’eh v’zoo eino na’eh. This is nice, this is not nice.