The joyousness of the Christian life must be reflected in both the life and the message of the preacher.
From Lewis Allen:
Joy in Christ and his grace is the most convincing sign that the gospel has won our hearts. If we say we’ve been brought to Jesus and are his willing servants but live joyless lives, then there is a problem. If we preach out of a heavy sense of obligation, we are in trouble. And if we honestly believe that people will be won for Christ through our dutiful, even faithful and conscientious — but actually joyless — preaching, then we are deceiving ourselves. The whole world is looking for joy. The church is looking for it, too. And everyone’s looking at you. You’re the preacher, who’s supposed to have a message, even a life-transforming one. Are you being changed, then, in this one area that everyone longs for most of all? Are you a joyful preacher, whose words match the revolution you’re experiencing?
The Preacher’s Catechism, Lewis Allen, Crossway, 2018, pg 32.