子曰:「吾有知乎哉?無知也。有鄙夫問於我,空空如也;我叩其兩端而竭焉。」
The Master said, 'Am I indeed possessed of knowledge? I am not knowing. But if a mean person, who appears quite empty-like, ask anything of me, I set it forth from one end to the other, and exhaust it.'