Better a witty fool man than a foolish wit.

宁做聪明的傻子，不做愚蠢的聪明人。

《新英汉大辞典》

Though it is obvious that he is no fool, he has no fear of saying foolish things.

尽管很明显的他不是个傻子，他不怕说些傻话。

youdao

I assure you that a learned fool is more foolish than an ingnorant fool.

我向你保证，一个有学问的傻瓜比无知的傻瓜更傻。

youdao