君子欲讷于言而敏于行。

Confucius 论语·里仁

Jūnzǐ yù nè yú yán ér mǐn yú xíng.
君子欲讷于言而敏于行。

A gentleman wishes to be cautious of speech but swift to act.

君子 gentleman; 
欲 wish, desire; 
讷 slow of speech; 
于 to, for, at; 
言 word, speech; 
而 and, but, yet; 
敏 quick, agile; 
行 do, carry out