One who claims to be saved and yet is not happy in the Lord, has not understood true salvation. The only people on earth who know real happiness or have an entrance into the joys of salvation are "born again" Christians. In their knowledge of sins forgiven and washed away by the precious blood of Christ, and of souls saved for all eternity, what could result but a flood of thanksgiving and "joy unspeakable and full of glory"?
The worldly person believes that conversion to God puts a damper on happiness. That is its testimony as to the result of what it knows nothing about. If one has never tasted the pure waters of redeeming love, how can he compare it to the polluted pleasure streams of this world? The Word tells us to "taste and see that the Lord is good."
It is a poor testimony to claim to have received the "good tidings of great joy" and then display to an unbelieving world a spirit of gloom. Friend, have you believed the glad tidings? Are you rejoicing in eternal life? If not, you have missed the greatest, the only true and abiding joy to be found on earth.