We are called to live a live of discipline in our enthusiasm in working and serving. The Bible says that whatever we do, it should be done unto the Lord (Colossians 3:23). This scripture further challenges us to do it enthusiastically.
The world is watching us. We lose our edge, and they notice it. They may not understand why we have it, but they notice it when it is gone. This became clear to me about a year and a half ago. I knew that I was struggling. I was going through the motions. I was working hard. I was serving the Lord, but I had lost my enthusiasm. Honestly, I didn’t think that people noticed.
Then my world came crashing down around me when I was fired. It was then I found out that people noticed. One of the girls I ran into just a week later said, “Jackie, you look so much happier. Less weighted.” I knew I had lost my joy, but I thought that my happy mask covered it.
Happiness though is an emotion, emotions can be masked. Joy is a fruit of the spirit, it can not be hidden or pretended. Our joy is unspeakable, and full of glory. That is enthusiasm. When we serve with joy, the world takes notice. When we work with joy, the world sees the difference.
We must discipline our self to walk out the joy of the Lord in everything we do. We are working unto Him. Being lazy is not an option. Serving without enthusiasm is not an option. Working hard is not enough. We must discipline our self to work with enthusiasm. 
Restoring Voice 