Following the Puritan William Ames’ excellent teaching concerning the doctrine of the Scriptures are some helpful words from Princeton theologian Charles Hodge that the central message of Scripture is clear and understandable (“perspicuous”)–
The Bible is a plain book. It is intelligible by the people. And they have the right, and are bound to read and interpret it for themselves; so that their faith may rest on the testimony of the Scriptures, and not on that of the Church. Such is the doctrine of Protestants on this subject.
It is not denied that the Scriptures contain many things hard to be understood; that they require diligent study; that all men need the guidance of the Holy Spirit in order to right knowledge and true faith. But it is maintained that in all things necessary to salvation they are sufficiently plain to be understood even by the unlearned.
It is not denied that the people, learned and unlearned, in order to the proper understanding of the Scriptures, should not only compare Scripture with Scripture, and avail themselves of all the means in their power to aid them in their search after the truth, but they should also pay the greatest deference to the faith of the Church. If the Scriptures be a plain book, and the Spirit performs the functions of a teacher to all the children of God, it follows inevitably that they must agree in all essential matters in their interpretation of the Bible. And from that fact it follows that for an individual Christian to dissent from the faith of the universal Church (i.e., the body of true believers), is tantamount to dissenting from the Scriptures themselves.
What Protestants deny on this subject is, that Christ has appointed any officer, or class of officers, in his Church to whose interpretation of the Scriptures the people are bound to submit as of final authority. What they affirm is that He has made it obligatory upon every man to search the Scriptures for himself, and determine on his own discretion what they require him to believe and to do.
Charles Hodge, Systematic Theology (1871), 1:183-84.