How is one to 'catch' that joy somehow??? Do you not teach that as well??? Why would people NOT leave your religion if they couldn't find out how to get the joy that comes from being a child of God???
I have always (where "always" means "since 1974" when I wrote an essay about it) considered, "What must I do to be saved?" to be a very delicate question. I think "How is one to 'catch' that joy?" falls in that class. It suggests that the joy depends on something done by the beloved. And that sure sounds like "works righteousness" to me.
Faith comes by hearing and hearing by the word of God, right? when allowed, I try to put it out there, chumming the waters, so to speak. The same grace which opens the ears of my hearers will tell them what the next step is.
When, in the summer of 1976 I ran a "beach ministry" on the Gulf Coast (last time I had a good tan, last time I got to use my first aid training -- well, except for the guy I Heimliched -- who did NOT thank me; he was angry!) I had a running joke with the guys who ran the "Jesus is Lord Surf Shop" (No kidding!)
They'd ask, "How many people did you save today?" and I'd answer, "I don't save people. GOD saves people."
I know my place, sometimes. It is to be forgotten. He must increase; and I must decrease. If I increase at all, I blew it.