The fact that as a human we expect things. The good and the bad. But we find that we are taken aback when either comes. Remember that things are better in the end. If it's not okay then it's not the end.
"It's the way people try not to change that's unnatural. The way we cling to what things were instead of letting things be what they are. The way we cling to old memories instead of forming new ones. The way we insist on believing despite every scientific indication that anything in this lifetime is permanent. Change is constant. How we interpret change is up to us." Grey's Anatomy quotes