“Maybe we're not supposed to be happy. Maybe gratitude has nothing to do with joy. Maybe being grateful means recognizing what you have for what it is. Appreciating small victories. Admiring the struggle it takes simply to be human. Maybe we're thankful for the familiar things we know. And maybe we're thankful for the things we'll never know. At the end of the day, the fact that we have the courage to still be standing is reason enough to celebrate.”
We are all supposed to be happy. We can be, but our day is full of bad things like missing all the buses, trains, be dismissed of your job, have lost your phone, and so on. Everything has a solution: wait, look for and change. There can be no worries if you want, but you have to want ;-)
Just smile and let the world do the rest.