A big promotion and pay raise at work can turn into more responsibility and an extra ten hours a week at the office. A flat tire on the side of the road can turn into making a new friend in the service center waiting room. There are experiences in life that we’re prone to qualify as good or bad without knowing how they will ultimately affect us.
How has this idea affected me? Well, when something unexpected or unwanted occurs in my day, I'm less quick to judge its ramifications (and less likely to become upset over it). Running late and about to miss an appointment? Maybe if I'd gotten on the road when I'd planned, I might have been involved in an accident. Got laid off from your job? ;-) Maybe this is an opportunity to create a better life than the one you were living.
We never really know what the world has in store for us. Embrace change. Go with the flow. Savor each moment as it occurs. Trust that no matter what may happen today, there's a reason for it, and this is an important part of moving closer to where you are supposed to be.