У-165

he учи учёного coll (imper sent occas. used without negation to convey the same meaning fixed WO

do not give advice to those who are more experienced at sth. than you are

an old fox needs not (doesn't need) to be taught tricks

don't (try to) teach your grandmother to suck eggs.

«Неплохо, - сказал Антон, прочитав моё сочинение. -Только вот тебе мой совет: ...в Главлит дай липу, а не подлинник... Иначе не пропустят. И на конгресс не поедешь». - «Само собой разумеется, - сказал я, возбуждённый удачей. - Не учи учёного» (Зиновьев 2). That's not bad," said Anton when he'd read the work. "But here's my advice: don't give the real thing to the censorship, give them a bit of window-dressing....Otherwise they'll never pass it, and you'll never make it to the Congress." "But of course!" I said elated by my success. "Don't teach your grandmother to suck eggs!" (2a).