Longer Catechism (Orthodox) 11.256

Chapter 11 — Part I — Article IX (Of the Church)

Section 256. Q. How are we assured that the grace of God abides in the true Church? A. First, by this: that her Head is Jesus Christ, God and man in one person, full of grace and truth, who fills his body also, that is, the Church, with like grace and truth. John i. 14, 17. Secondly, by this: that he has promised his disciples the Holy Ghost to abide with them forever, and that, according to this promise, the Holy Ghost appoints the pastors of the Church. John xiv. 16. The Apostle Paul says of Jesus Christ, that God the Father gave him to be head over all things to the Church, which is his body. Eph. i. 22, 23. The same Apostle says to the pastors of the Church: Take heed therefore unto yourselves, and to all the flock, over which the Holy Ghost hath made you Bishops, to feed the Church of our Lord and God, which he hath purchased with his own blood. Acts xx. 28.