not more and not less, the chovos halevavos… ‘nisht mer nisht venig’ doesn’t translate well into english
How about ‘it was written by no less than the chovos halevavos’?
Agav, have you ever tried speaking Yiddish to Gerrer chassidim in Israel? They look at you as if you have fallen off the moon! (Agav, is agav Yiddish or Hebrew?)