I think that one of the reasons many have difficulty feeling real joy is that we have too little awareness that the joy within the church has its own style. It is a different way of being joyful.
The most important question for believers and the church is whether they will one day be allowed to enter the joy of their Lord, out of the great oppression.
This article considers how to be Reformed in our evangelism, and it does so through an evaluation of ideas in a book by Stefan Paas on the importance of Reformed principles for evangelism.