but if I wait long, that you may know how men ought to behave themselves in the house of God, which is the assembly of the living God, the pillar and ground of the truth.
Hence we may easily conclude in what sense Paul uses these words. The reason why the Church is called the “pillar of truth” is, that she defends and spreads it by her agency. God does not himself come down from heaven to us, nor does he daily send angels to make known his truth; but he employs pastors, whom he has appointed for that purpose. To express it in a more homely manner, is not the Church the mother of all believers? Does she not regenerate them by the word of God, educate and nourish them through their whole life, strengthen, and bring them at length to absolute perfection? For the same reason, also, she is called “the pillar of truth;” because the office of administering doctrine, which God hath placed in her hands, is the only instrument of preserving the truth, that it may not perish from the remembrance of men. 