Bible Minus Authority = Bad Theology
Bible - Authority = 200 interpretations of the Eucharist within 100 years of the reformation
Bible - Authority = rejection of sacramental grace
Bible - Authority = permissible divorce
Bible - Authority = contraception
Bible - Authority = novel doctrines
Bible - Authority = thousands and thousands of divergent Christian sects
Bible - Authority = redefinition of marriage
Bible - Authority = rejection of 2000 years of Christian history
Bible - Authority = snake handling, refusal of blood transfusions, refusing insulin etc leading to death
Anyone else see why we need an infallible teaching authority to lead us in all truth? We need The Church built on Peter, not just the bible alone with our own personal interpretation. Do the math!
In the 5th century Saint Vincent of Lerins said this about using the bible alone as source of all truth, without Sacred Tradition (Authority):
"I have often then inquired earnestly and attentively of very many men eminent for sanctity and learning, how and by what sure and so to speak universal rule I may be able to distinguish the truth of Catholic faith from the falsehood of heretical pravity; and I have always, and in almost every instance, received an answer to this effect: That whether I or any one else should wish to detect the frauds and avoid the snares of heretics as they rise, and to continue sound and complete in the Catholic faith, we must, the Lord helping, fortify our own belief in two ways; first, by the authority of the Divine Law, and then, by the Tradition of the Catholic Church.
But here some one perhaps will ask, Since the canon of Scripture is complete, and sufficient of itself for everything, and more than sufficient, what need is there to join with it the authority of the Church’s interpretation? For this reason,—because, owing to the depth of Holy Scripture, all do not accept it in one and the same sense, but one understands its words in one way, another in another; so that it seems to be capable of as many interpretations as there are interpreters. For Novatian expounds it one way, Sabellius another, Donatus another, Arius, Eunomius, Macedonius, another, Photinus, Apollinaris, Priscillian, another, Iovinian, Pelagius, Celestius, another, lastly, Nestorius another. Therefore, it is very necessary, on account of so great intricacies of such various error, that the rule for the right understanding of the prophets and apostles should be framed in accordance with the standard of Ecclesiastical and Catholic interpretation.