Christ promised to guide his Church to all truth

Marcus Grodi in What is Truth?

As Protestants we had become infatuated by our freedom, placing personal opinion over the teaching authority of the Church. We believed that the guidance of the Holy Spirit is enough to lead any sincere seeker to the true meaning of Scripture.

The Catholic response to this view is that it is the mission of the Church to teach with infallible certitude. Christ promised the apostles and their successors, “He who listens to you listens to me. And he who rejects you rejects me and rejects the one who sent me” (Luke 10:16). The early Church believed this too. A very compelling passage leaped out at me one day while I was studying Church history:

The Apostles received the gospel for us from the Lord Jesus Christ; and Jesus Christ was sent from God. Christ, therefore, is from God, and the Apostles are from Christ. Both of these orderly arrangements, then, are by God’s will. Receiving their instructions and being full of confidence on the account of the Resurrection of our Lord Jesus Christ, and confirmed in faith by the Word of God, they went forth in the complete assurance of the Holy Spirit, preaching the Good News that the kingdom of God is coming. Through countryside and city they preached; and they appointed their earliest converts, testing them by the Spirit, to be the bishops and deacons of future believers. Nor was this a novelty: for bishops and deacons had been written about a long time earlier. Indeed, Scripture somewhere says: “I will set up their bishops in righteousness and their deacons in faith (Clement of Rome, Epistle to the Corinthians 42:1-5 [ca. A.D. 80]).

Another patristic quote that helped breach the wall of my Protestant presuppositions was this one from Irenaeus, bishop of Lyons:

When, therefore, we have such proofs, it is not necessary to seek among others the truth which is easily obtained from the Church. For the apostles, like a rich man in a bank, deposited with her most copiously everything that pertains to the truth; and everyone whosoever wishes draws from her the drink of life. For she is the entrance to life, while all the rest are thieves and robbers. That is why it is surely necessary to avoid them, while cherishing with the utmost diligence the things pertaining to the Church, and to lay hold of the tradition of truth. What then? If there should be a dispute over some kind of question, ought we not have recourse to the most ancient churches in which the apostles were familiar, and draw from them what is clear and certain in regard to that question? What if the apostles had not in fact left writings for us? Would it not be necessary to follow the order of tradition, which was handed down to those to whom they entrusted the Churches? (Against Heresies 3,4,1 [ca. A.D. 180]).

I studied the causes for the Reformation. The Roman Catholic Church of that day was desperately in need of renewal but Martin Luther and the other Reformers chose the wrong, the unbiblical, method for dealing with the problems they saw in the Church. The correct route was and still is just what my Presbyterian friend had told me: Don’t leave the Church; don’t break the unity of faith. Work for genuine reform based on God’s plan, not man’s, achieving it through prayer, penance, and good example.

I could no longer remain Protestant. To do so meant I must deny Christ’s promise to guide and protect his Church and to send the Holy Spirit to lead it into all truth (cf. Matt. 16:18-19, 18:18, 28:20; John 14:16, 25, 16:13).