And I will ask the Father: and He shall give you another Paraclete, that he may abide with you for ever: The Spirit of Truth, whom the world cannot receive, because it seeth Him not, nor knoweth Him. But you shall know Him; because He shall abide with you and shall be in you. ... the Paraclete, the Holy Ghost, whom the Father will send in my name, He will teach you all things and bring all things to your mind, whatsoever I shall have said to you. ... when He, the Spirit of Truth, is come, He will teach you all truth.We have it on the promise of Christ that the Holy Spirit will be present in the Church forever and will guide it to all truth. This is why we accept the official teachings of the Church and abide by the decisions of its Councils. You refuse to do that. You place your private opinion and the opinions of individual liturgists above the authority of the Church to modify the liturgy. You lead others into your misguided ways. For the sake of those who might actually take you seriously I offer the following thoughts:
--John 14:16-17,26; 16:13
The Church had already converted the known world before the official transition of the liturgy from Latin to Greek under the reign of Pope Damasus (366 to 384 A.D.). So you see, the Tridentine Mass is certainly not essential to the Catholic faith. Here are some excerpts from descriptions of the Mass by St. Justin, who was martyred around 165 A.D.
On the day which is dedicated to the sun, all those who live in the cities or who dwell in the countryside gather in a common meeting, and for as long as there is time the Memoirs of the Apostles or the writings of the prophets are read. Then, when the reader has finished, the president verbally gives a warning and appeal for the imitation of these good examples.Now that certainly doesn't sound exactly like a Tridentine Mass, but it is obvious it is the Mass and there were many who attended Masses like the one described above who were martyred for the faith. So it appears heroic holiness can be achieved without the Tridentine Mass.Then we all rise together and offer prayers, and, as we said before, when our prayer is ended, bread is brought forward along with wine and water, and the president likewise gives thanks to the best of his ability, and the people call out their assent, saying the Amen. Then there is the distribution to each and the participation in the Eucharistic elements, which also are sent with the deacons to those who are absent. Those who are wealthy and who wish to do so, contribute whatever they themselves care to give; and the collection is placed with the president, who aids the orphans and widows, and those who through sickness or any other cause are in need, and those who are imprisoned, and the strangers who are sojourning with us - and in short, he takes care of all who are in need.
--First Apology of Justin
Here is an excerpt from the catechetical instructions given to the newly baptized by St. Cyril of Jerusalem around 350 A.D. St. Cyril is teaching them how to receive communion:
In approaching therefore, come not with thy wrists extended, or thy fingers spread; but make thy left hand a throne for the right, as for that which is to receive a King. And having hollowed thy palm, receive the Body of Christ, saying over it, Amen. So then after having carefully hallowed thine eyes by the touch of the Holy Body, partake of it; giving heed lest thou lose any portion thereof; for whatever thou losest, is evidently a loss to thee as it were from one of thine own members. For tell me, if any one gave thee grains of gold, wouldest thou not hold them with all carefulness, being on thy guard against losing any of them, and suffering loss? Wilt thou not then much more carefully keep watch, that not a crumb fall from thee of what is more precious than gold and precious stones?So, things change. The church went from communion in the hand to receiving on the tongue and back to receiving communion in the hand in our own time. We no longer touch the Eucharist to our eyes or touch our lips while they are still moist with the precious blood and then touch our eys and ears. What would seem irreverent in our time was seen as showing great reverence in another. Things change.Then after thou hast partaken of the Body of Christ, draw near also to the Cup of His Blood; not stretching forth thine hands, but bending, and saying with an air of worship and reverence, Amen, hallow thyself by partaking also of the Blood of Christ. And while the moisture is still upon thy lips, touch it with thine hands, and hallow thine eyes and brow and the other organs of sense. Then wait for the prayer, and give thanks unto God, who hath accounted thee worthy of so great mysteries.
--Lecture XXIII, On the Sacred Liturgy and Communion
The church has the right to change them. It has done so for centuries. And there have always been those misguided souls like ultima ratio who think the liturgical practices can't ever change from what they are used to. It is dead things that don't move or change. That is because they are not animated by a spirit. The church is alive. It is animated by the Holy Spirit. Those who possess the Spirit change with it. No, we don't change in essentials. But we leave it up to the Holy Spirit in the Church to guide it in making necessary changes to non-essentials. Don't entrust your immortal soul to the silly, amateur opinions of ultima ratio or individual liturgists like Klaus Gamber. Entrust your immortal soul to the Holy Spirit in the Church.