Today is Sunday, a day of rest, and one's state always goes up and down, and today I was no exception to the rule of trying to do something else. In the morning, I was dizzy while reading, I picked up and put down my note cards, I didn't feel very productive today, and my mood was a bit low. I went out for lunch with my son, and he talked about his games and classmates along the way, which made my heart skip a beat. I don't know if that's what other kids at home talk about when they talk to t...