The Roman Catholic Church and various Evangelical Churches (among which there are even some Pentecostal Churches) are in favour of ecumenism. That’s why the Roman Catholics say to us: ‘Let us join together because we are all brothers, let us not remain divided because such a division is a scandal!’ and more and more Evangelicals say: ‘Why should we refuse to join the Roman Catholics in evangelization and prayer, when they also worship the same God and believe in the same Lord? Let us get rid of the old prejudices against the Roman Catholics, because the modern Roman Catholic Church is different from the ancient one’.

I exhort you, brothers, to flee this ecumenism because it is nothing but a device of the devil, who wants you to ally with those who hate the Word of God, that is, the Roman Catholics, in order to induce you to stop exposing the heresies of the Roman Catholic Church and winning the Catholics to Christ.

It is clearly written: “Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness? And what concord hath Christ with Belial? or what part hath he that believeth with an infidel? And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people. Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you, And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty” (2 Corinthians 6:14-18).

Therefore, ecumenism is not a yoke fitting for us, because through it we would associate with people with whom there is no fellowship and there can be no fellowship and no accord, because they walk in darkness, being carried away to their dumb idols, and hold to all kinds of commandments of men who turn from the truth; I refer to the Roman Catholics.

I have widely demonstrated all this in my book against the Roman Catholic Church (at the moment the whole book is only in Italian; however I have translated the confutations of some Roman Catholic heresies, which you can read on line).

Therefore, you can’t say to the Roman Catholics: ‘Brothers, let’s pray together, and let’s work together to evangelize the pagans, etc.’, but you must continue to say to them: ‘Repent of your dead works and believe in the Gospel and come out from among the Roman Catholic Church without hesitation’ for your good and for their good as well. Stand firm in the faith; let no one deceive you with his sophisms.