Bhagavad Gita, Chapter 10, Verse 18

Speak to me again in detail, Janârdana, of Your Yoga-powers and attributes; for I am never satiated in hearing the ambrosia of Your speech.

This real desire for more is described as growing, not fading, the more it's actually satisfied.

Calling the teaching nectar captures something true about it, hearing it doesn't use it up, it deepens the appetite for more. Real satisfaction and real longing are shown existing together, not canceling each other out.