This is heroism. You don't have to run into a burning building to save a child to be a hero, you just have to be in touch with that God within. Enthusiasm is not something granted to some and absent in others. All of us have a God within. Some of us choose to be in touch with it and display it, while others mask it and allow it to remain dormant.
Enthusiasm is a quality that nourishes success.
When people ask me the secret of giving a great talk, I tell them it is being authentically enthusiastic. Be this and you will be loved and forgiven for any flaws. Enthusiasm spreads joy because there is nothing depressing about it. It has faith on its side since all fear subsides when enthusiasm is present. It is accepting because all doubt has been banished and there is no uncertainty.