A martial-arts lesson

I used to think that, ideally, teachers should be taking classes as they're teaching classes, because being a student helps them remember what's effective in the classroom and reminds them of the value of practicing patience with those students who deserve it.

Now, I think that teachers should ideally be taking classes in something at which they are not naturally gifted while they're teaching.

It's a distinction that absolutely makes a world of difference. Whereas I might have demonstrated patience with struggling students before, I'm much more likely to actually be patient now.