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 [1 Tim. 3:15].
I have selected this as the key verse of this epistle because 1 Timothy is a book about church order. While he is away Paul writes, “I’ve written this to you so you will know how to act in the house of God.”
“The church of the living God”—Paul is speaking to the church that is the church.
“The pillar and ground of the truth.” “Pillar” means the stay, the prop, or that which is foundational. What Paul is saying is that the church is the pillar, the bedrock—it is the prop and support of the truth. If the officers do not represent the truth, the church has no foundation, no prop, and it cannot hold up the truth of God.
Some men purport to represent the truth, but they actually do not represent the truth in the way they lead their lives. I knew a deacon once who carried the biggest Bible I have ever seen. Every time you saw him he was weighed down on one side carrying that Bible. But he was a man you couldn’t depend upon—there was a question about his integrity. He hurt the church he served and brought it into disrepute. Paul is writing to tell the church how it should act so that it can represent and proclaim the truth of God to the world on the outside.
McGee, J. Vernon: Thru the Bible Commentary. electronic ed. Nashville : Thomas Nelson, 1997, c1981, S. 5:445