This is Calvin, who is not my cat (though they would do this if given the chance).
Expectations are a tricky thing. They can get us in all kinds of trouble, even a reasonable one. We don't expect a terrible disaster when we wake up in the morning. We don't even expect our toast to be burned. Yet these things happen. They happen every day. They are reminders that our days are not entirely our own.
Trusting our days - the every part of the day - to the sovereignty of God is a difficult task. It goes against our independent nature. Yet if we make the conscious effort, not just the intellectual ascent, it makes for peace in all circumstances, even those unpleasant surprises.