What knowledge do I possess of the tavern's assembly, seeing the cupbearer's gaze, having traveled beyond the mere company of wine.

This couplet is a profound declaration of transcendence. The poet is saying that his experience has gone far beyond the superficial pleasures of earthly revelry (bazm-e-aish) or even the joy of intoxication. Having seen the essence (the 'cup') of the guide (the Saqi), he has journeyed to a level of realization that worldly pleasures simply cannot comprehend. It’s a journey from physical pleasure to spiritual truth.