Radiating inner joy

Here's a passage from The Alchemist:

The candy seller had a smile on his face: he was happy, aware of what his life was about, and ready to begin a day's work. His smile reminded the boy of the old man - the mysterious old king he had met. "This candy merchant isn't making candy so that later he can travel or marry a shopkeepers daughter. He's doing it because it's what he wants to do," thought the boy. 

I guess that sort of joy and radiance is reflected on a person's face when one does what one truly wants!

I wonder how many of us religious reflect that radiance?