King James Version
But if I tarry long, that thou mayest know how thou oughtest to behave thyself in the house of God, which is the church of the living God, the pillar and ground of the truth.English Standard Version
if I delay, you may know how one ought to behave in the household of God, which is the church of the living God, a pillar and buttress of truth.New International Version
if I am delayed, you will know how people ought to conduct themselves in God's household, which is the church of the living God, the pillar and foundation of the truth.