I think it goes both ways. If you know someone well, you can be a much better teacher to them. You can predict what they will have trouble with, what will make

I think it goes both ways. If you know someone well, you can be a much better teacher to them. You can predict what they will have trouble with, what will make them happy, how and when to introduce things to them, etc. Same as interacting with coworkers. And in management, really.