Well, the first thing I had to do was to read a lot. First of all, about education... and looking at education from the Middle Ages right through to the 20th Century. The second major area was country life in the 19th Century, which I don't know much about these days.
Film is the manipulative medium par excellence. When you think back on the history of film and the 20th century, you see the propaganda that's been made. So there are moral demands on the director to treat the spectators as seriously as he or she takes himself and not to see them merely as victims that can be manipulated to whatever ends they have.
It's unbearable when someone changes around you. Just imagine that your life partner changes, then it is difficult to cope with. Or your mother. Or your father. They were strong and now they're like a baby - it's not so funny.
My mother as a young girl went out with a young SS officer and she didn't really know what was going on - she just liked the uniform. When he told her about the things that he did, she was disgusted and broke up with him.
I think that what's important as a director is to give your actors the feeling that they're protected, the feeling of confidence, the feeling that if they make mistakes, then as a director, you'll know how to help them. If you're able to convey that, then the actors will give you wonderful performances. As well as the author, you have to write scenes that give the actors the opportunity to show what they're capable of.