How to Show, Not Tell

I am happy to introduce you to another excellent writing tip by Diane Callaghan.
As a debut writer, I couldn't understand why,

"Anger reign inside of him beyond his control." 
"Fear was visible in her eyes." 
"Joyous feeling overpowered her; she was happy he was alive and well," 

​was considered "wrong," or "not good writing."

"Show me, don't tell how the character feels," my lovely editor Laura would say. 
In other words, let me feel their emotions, see through their eyes. Hear what they hear. 

Easier said than done, right?

Well, I'm happy to announce that after many hours of searching, I found this fantastic video that helped me distinguish the difference between "Show and Tell," in the Written World. 
P.S. That doesn't mean I won't make the same mistakes. After all, I'm still a debut author. However, I'll know what my editor is talking about, and how to correct it.