"Education is a progressive discovery of our own ignorance." ~ Will Durant
In the past, when I've attended a course or seminar, I've walked out and talked to some of the others about what they took from it. Now, naturally there's room for individual interpretation and understanding - this is the beauty of perspective.
Unfortunately, I find that occasionally someone goes in with the goal not of learning, but confirming. Whereas I do my best to enter with an open mind, and an attitude of "show me something I don't know" (and I'll be the first to admit that I don't always succeed at this), I find there are some people who have their mind made up when they enter the room - and they twist and manipulate all the information into an entirely different meaning to make it fit into their idea of what's right, thereby rendering the entire process meaningless.
So the next time you're going into a class, seminar, meeting (etcetera), I offer you a challenge: go into it hoping to be shown something entirely new.
Seek an education, rather than validation.