How to be happy even in adverse situation, spiritually?

It is not possible to be happy in adverse situations, unless you are high on narcotics. There is no need to be happy in adverse situations. One can easily fake happiness or simplicity. But in reality, You are what you are. If you are angry, you are angry. If you are sad, you are sad. Why do you want to turn your anger into happiness? You cant do that in reality, you can only fake that. People all around the world fake emotions. They are not natural at all.