> The enlightened sit nodding along, while the unenlightened go away confused or misled. It's even worse (and quite common) when those who don't understand are

> The enlightened sit nodding along, while the unenlightened go away confused or misled. It's even worse (and quite common) when those who don't understand are the ones nodding along. Knowing when you really understand something, and when you don't, is such an important milestone for people to get to, and quite hard to teach.