Musical quality is surely compatible with devotion to the Lord, but outside the concert hall virtuoso performances are suspect, and showing off has no place in the throne room of God. Nor does it belong in church, as it has no ministry to the saints beyond giving them a chance to exercise forbearance and charity. Yes, and modest, too, thus giving a right model for any Christian worker tempted to exalt himself. And they that are Christ's have crucified the flesh with the affections and lusts. In both events the lust of the flesh involved food.
Carnality includes both indulging the flesh and inviting others to do the same.
The life of the Spirit, like charity, does not behave itself unseemly. Granted, a spiritual ministry will make spiritual demands. The spiritual ministry does not call attention to itself. During the service it conveys a certain quiet sense of appropriateness. What happened in church would somehow be in place in the throne room of God.