As a hymn that celebrates the ideal worshipper, Ps. 15 can be read as a liturgical call and response.
O Lord, who shall sojourn in your tent?
Who shall dwell on your holy hill?
He who walks blamelessly and does what is right
and speaks truth in his heart;
who does not slander with his tongue
and does no evil to his neighbor,
nor takes up a reproach against his friend;
in whose eyes a vile person is despised,
but who honors those who fear the Lord;
who swears to his own hurt and does not change;
who does not put out his money at interest
and does not take a bribe against the innocent.
He who does these things shall never be moved.
As the psalmist celebrates the ideal worshipper, we see that the psalmists interrogation is comprehensive. From his relational life, to his moral life, to his economic life, the worshipper is praised for being blameless. The reward for such blamelessness is being able to stand before the Lord.
This worshipper is the true Israelite who has been faithful to the covenant; loving God and loving neighbor.
When we come to corporate worship as the church, we must undergo the same interrogation, but we do so in a way that is mediated and participatory. The church must stand before her God and be judged, but if she is truly the church, she need not fear.
Through the Spirit, the church participates in Jesus’ blamelessness.
In Truth, the church’s worship is mediated by the true Israelite, Jesus.
For churches to worship the Father in Spirit and Truth, this is what it means. Churches that expect their members to offer the Father perfect worship on their own, remove the heart of worship, which is Jesus. To worship rightly, is to worship the Father in Christ by the Spirit. For, “He who does these things shall never be moved.”