敏于事而慎于言
mǐn yú shì ér shèn yú yán
1. quick in action, cautious in speech
2. the Confucian model of acting decisively but speaking sparingly
3. (lit.) quick at affairs yet careful at speech
Jūnzǐ shí wú qiú bǎo, jū wú qiú ān, mǐn yú shì ér shèn yú yán.
'The gentleman in eating does not seek fullness, in dwelling does not seek comfort - quick in action, cautious in speech.'