It can be very hard for people to tolerate uncertainty. For those with OCD (Obsessive Compulsive Disorder), it can be especially (and excruciatingly) difficult.
 
We want to know for sure, did we run someone over? Is that person mad at me? Am I going to hell?
 
But the longer you spend trying to figure out a "certain" answer, the more of your life you give over to OCD.
 
Almost nothing in our lives is certain, and you will suffer if you try to seek certainty that isn't there. The only way out of this cycle is to embrace uncertainty. Made of stainless steel, laser engraved.