Dictionary.com defines joy as:
"1.the emotion of great delight or happiness caused by something exceptionally good or satisfying; keen pleasure; elation: She felt the joy of seeing her son's success.
2.a source or cause of keen pleasure or delight; something or someone greatly valued or appreciated: Her prose style is a pure joy.
3.the expression or display of glad feeling; festive gaiety.
4.a state of happiness or felicity."
I often think that I would like to feel joy constantly. But looking at the above definition, it would be nearly impossible to constantly feel joy. And yet, that is what Christians are called to. It is one of the fruits of the Spirit. When our eyes are not focused on ourselves--because we can't possibly create joy within ourselves-- none of us are that exceptionally good or satisfying, nor can we be the cause of keen pleasure or delight constantly, nor will we always feel glad, or festive gaiety. However, when we focus on Christ, and what he has done for us, it is possible to be joyous. Which makes me think that if I want more joy in my life, I'd better start thinking about my Creator more often!