1 Timothy 3:15
in case I am delayed, so that you will know how each one must conduct himself in God’s household, which is the church of the living God, the pillar and foundation of the truth.
What it says
He writes so Timothy will know how one must conduct himself in God's household, the church of the living God, the pillar and foundation of the truth.
What it is doing
It gives the church's identity and the purpose of Paul's instructions.
In context
14Although I hope to come to you soon, I am writing you these things 15in case I am delayed, so that you will know how each one must conduct himself in God’s household, which is the church of the living God, the pillar and foundation of the truth. 16By common confession, the mystery of godliness is great: