提笔写忧伤落笔写惆怅
[tí bĭ xiĕ yōu shāng luò bĭ xiĕ chóu chàng]
Translating to 'lifting the pen I write my sorrow; placing down I express my melancholy.' This idiom portrays through action -writing- the emotional state of feeling distressed and gloomy, conveying profound longing or dissatisfaction.