I was trying to figure out why this one stood out, and I then I realized it's so much more external than most of what I've read -- less introspection and more interaction with people around him. It's easy to think about 4x04 in a vacuum, but I love that you've acknowledged what he's actually surrounded by on a daily basis. But as far as introspection goes, I quite like the attention drawn to the contrast between "silence from Kurt before" and "silence from Kurt after."