Full Idea
Part of my joy in learning is that it puts me in a position to teach.
Gist of Idea
One joy of learning is making teaching possible
Source
Seneca the Younger (Letters from a Stoic [c.60], 006)
Book Reference
Seneca: 'Letters from a Stoic (Selections)', ed/tr. Campbell,Robin [Penguin 1969], p.39
A Reaction
This doesn't quite distinguish between bad learning and good learning, but I take a commitment to wanting to teach what you know as an essential part of wanting to know.