I dated a girl, and she said, "I'm quiet inside, let nature take its course, and I don't care about things outside the window." What does that mean?

What she means, quiet inside, is that feelings let nature take its course, and there is no escape or denial. It means you don't want to spend your time thinking about other things. I think this sentence has no other meaning. I just want to be plain with you and don't want to care too much about other things. I hope to adopt.