The gospel is the most relevant message there ever was or is, even today. The problem of sin, and its solution, is the most relevant thing to any human being.
We make it seem irrelevant by distracting from it in our churches. Big days, big events, big name preachers, big shows - oh, and by the way, if no one is offended, here's a liitttllee gospel sermonet to validate the rest of what's going on. Even in so-called fundamental churches, the gospel is NOT the focus. We may say it is with our lips, but we do not show it with our schedules and emphasis.
Just this past weekend I met with a Hylesite church planter who told me in no uncertain terms that if a new church plant expects to succeed, they better have a day care, DAILY youth programs, a play ground, a day school, special services weekly, well-known evangelists and singing groups...and never a word about the power gospel. "People are tired, and want to get rid of their kids for a while" is the way he put it. Oh, he said you've got to do door-to-door soul winning too, but that would be ineffective without the extra attractions. And he plans to fully utilize them.
So much for the Gospel being the power of God unto salvation, and continuing in the apostle's doctrine and fellowship. Now it's candy and clowns.
So we keep the kids entertained until they get to be about 18 years old or so, then they leave the church. So then we bring in rock and roll to get them back, and if they come back what do we have?
If young adults are leaving all kinds of churches, from liberal to fundamental, maybe it's just old fashioned rebellion that is in the heart of man, and has been encouraged by our society to be expressed by our young people. Of course, we recognize that this is all permitted by God, and serves His purpose to and end we can't fully see. Dare we admit that some of our kids are not elect, or at least, not regenerate?
In any case we must be diligent to preach the true Gospel of man's depravity, God's wrath toward the unrepentant, and His mercy toward those that will come to believe through grace. It is the ONLY message that is relevant to the thirsty soul.
Sorry, got a little preachy there.