You could still teach others and tell them where they are making mistakes. You have great knowledge, Ser Jaime. It would be a waste not to share it. It'd be like Lord Tyrion drinking in a corner and not sharing his brilliant mind.

( Sansa has seen him do that very thing, actually, and it had been a pity even if she hadn't recognized it to be one at the time. )

There's something you'll take to, I'm sure of it.