坐而論道 [－－论－]

Jyutping zo6 ji4 leon6 dou6
Pinyin zuò ér lùn dào

Definitions (CC-CEDICT)
  1. to sit and pontificate; to find answers through theory and not through practice (idiom)
Definitions (Wiktionary)
  1. phrase, derogatory, idiomatic
    to indulge in empty talk instead of doing anything useful