When you do what you love, You feel “River of Joy” flows inside your body. That’s exactly how I can describe this feeling.
You don’t even realize whether it’s a weekend or weekday. You don’t worry at all what time it is. It all about keeping that “River of Joy” running through your body.
It’s a similar feeling to “butterflies in your stomach” when you fell in love. However, butterflies still related to another party. If s/he doesn’t like you, your butterflies are going to disappear sooner or later. However, the River of Joy will continue to increase its flow as long as you keep doing what you love to do.