One of the things that gets us down about life is that it can feel so predictable. From the moment you open your eyes in the morning you know how your day will proceed and end. You know what the commute will be like, you know the hassles at work, the stress. You know what shows you will watch in the evening, what you will eat, and that you will lie your head down again on the self same pillow from whence you are about to proceed.
The only problem with this is that it is a lie.
You don't actually know what your day has in store for you. Just because the previous 2,999 days were similar does not mean the 3,000th will be the same. That is a logical fallacy. It's easy to fall into the trap of thinking your life is predictable, you may even have a lot of convincing evidence, but it cannot possibly be true for anyone. You don't know if any of the following are in store for you today: car crash, blazing psychological insight, stroke, the birth of a habit, recognition of a life altering fact that has been hiding in plain sight, the death of a habit, a resolve to change, dog bite, power outage, forgiveness, either needed or given, weather anomaly, coup d' etat, laid off, subpoena, a gift, a new friend, gout or flowers.
The most damning fact of all: the expectation of predictability only helps to shield you further from the positives on the above list.