Once upon a time...
in the forest, there lived a tree branch named Arthur. Arthur was not very happy. Often one could hear him sigh and complain:
"I hate it here. I hate the bugs crawling on me and the birds perching on me.
I don't like being stuck here. I want to move around. I want to go places. Do things. Be something special."
When they other branches hear his complaint, they just say, "We don't understand you. You are part of a tree. You should be happy. We have the nice bright sun, plenty of friends and we provide shelter for a lot of things.
You should be happy that you are not chopped down and used as for firewood or some other cruel fate that the birds tell of that happens to other trees."
But Arthur does not listen. He knows that they do not understand him. He just makes his silent wish that he was somewhere else doing some wonderful thing.