The thing about anger that a lot of people do not understand is that anger is not inherently bad. What you do with your anger is either good or bad. Or maybe even indifferent or evil.
We have to remember that our emotions are inate within us. They are natural. People can be happy while murdering people. I mean look at the leading serial killers. Sadness can lead to strenght and change. Look at the parents and children that survived school shootings.
I get angry sometimes and typically cannot hide it. My face is a beacon for strong emotions, whether good or bad. But that anger is just a natural process that my mind needs to process something.
Sadness is the same. Sometimes I need to just embrace my sadness for a little.
Emotions are tricky. They are important for our growth, as long as we use them for good.