All things in Scripture are not alike plain in themselves, nor alike clear unto all;¹² yet those things which are necessary to be known, believed and observed for salvation, are so clearly propounded and opened in some place of Scripture or other, that not only the learned, but the unlearned, in a due use of ordinary means, may attain to a sufficient understanding of them.¹³

¹² 2 Pet. 3:16
¹³ Ps. 19:7; Psalm 119:130

The Old Testament in Hebrew (which was the native language of the people of God of old),¹⁴ 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.¹⁵ 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,¹⁶ and search them,¹⁷ therefore they are to be translated into the vulgar language of every nation unto which they come,¹⁸ 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.¹⁹

¹⁴ Rom. 3:2
¹⁵ Isa. 8:20
¹⁶ Acts 15:15
¹⁷ John 5:39
¹⁸ 1 Cor. 14:6,9,11-12,24,28
¹⁹ Col. 3:16

The infallible rule of interpretation of Scripture is the Scripture itself; and therefore when there is a question about the true and full sense of any Scripture (which are not many, but one), it must be searched by other places that speak more clearly.²⁰

²⁰ 2 Pet. 1:20–21; Acts 15:15–16

The supreme judge, by which all controversies of religion are to be determined, and all decrees of councils, opinions of ancient writers, doctrines of men, and private spirits, are to be examined, and in whose sentence we are to rest, can be no other but the Holy Scripture delivered by the Spirit, into which Scripture so delivered, our faith is finally resolved.²¹

²¹ Matt. 22:29, 31, 32; Eph. 2:20; Acts 28:23