Literature Reference: 侃侃而谈，不卑不亢。—— 《论语·乡党》 Speaking confidently and with ease, neither humble nor arrogant. Source from 'The Analects of Confucius, Xiang Dang'.
侃: Brimming with confidence and composed with ease.
Meaning: Speaking with confidence and composure, showing a firm and assured attitude.