Confessions of faith are just that, a confession made by humans wanting to crystalize the doctrines of the Bible into easy to digest bits of theology. They are not binding but instructive. The confession I refer to most often is the London Baptist Confession of Faith written in 1689 and I will quote below.
Chapter 1: Of the Holy Scriptures
8. The Old Testament in Hebrew (which was the native language of the people of God of old), and the New Testament in Greek (which at the time of the writing of it was most generally known to the nations), being immediately inspired by God, and by his singular care and providence kept pure in all ages, are therefore authentic; so as in all controversies of religion, the church is finally to appeal to them. But because these original tongues are not known to all the people of God, who have a right unto, and interest in the Scriptures, and are commanded in the fear of God to read and search them, therefore they are to be translated into the vulgar language of every nation unto which they come, that the Word of God dwelling plentifully in all, they may worship him in an acceptable manner, and through patience and comfort of the Scriptures may have hope. ( Romans 3:2; Isaiah 8:20; Acts 15:15; John 5:39; 1 Corinthians 14:6, 9, 11, 12, 24, 28; Colossians 3:16 )
Now we are set to the task of finding the manuscripts that God has entrusted to believers.
Some might say that Christians are begging the question since we are assuming the proposition of the providential care and truth of the Bible...BUT the scientific method also assumes it's own propositions and epistemology. Science is therefore guilty of begging the question since the method used assumes induction and causation.
The unbeliever is in no better shape when it comes to their theory of knowledge. The unbeliever lives by faith, they cannot study all the information gather, yet they still believe the unbelievers outlook is correct