Providence and Preservation

The following arguments prove that the sources have not been corrupted. (1) The providence of God which could not permit books which it willed to be written by inspiration (theopneustois) for the salvation of men (and to continue unto the end of the world that they might draw from them waters of salvation) to become so corrupted as to render them unfit for this purpose. And since new revelations are not to be expected (after God has recorded in the Scriptures his entire will concerning the doctrine of salvation), what can be more derogatory to God (who has promised his constant presence with the church) than to assert that he has permitted the books containing this doctrine to become so corrupt that they cannot serve as a canon of faith? (2) The fidelity of the Christian church and unceasing labor in preserving the manuscripts; for since Christians have always labored with great zeal to keep this sacred deposit uncorrupted, it is not credible that they would either corrupt it themselves or suffer it to be corrupted by others...

Francis Turretin, in Institutes of Elenctic Theology

Hence, the providence of God hath manifested itself no less concerned in the preservation of the writings than of the doctrine contained in them; the writing itself being the product of his own eternal counsel for the preservation of the doctrine, after a sufficient discovery of the insufficiency of all other means for that end and purpose. And hence the malice of Satan hath raged no less against the book than against the truth contained in it.

John Owen, in Of the Divine Original, Authority, Self-Evidencing Light, and Power of the Scriptures