One wonderful aspect or attribute of Scripture is that it is clear in the matters of salvation. This has been called the perspicuity of Scripture. The Westminster Confession explains this teaching quite well in chapter 1, sections 6 & 7. One thing the Confession says is that both learned and unlearned people can attain a sufficient understanding of the Scriptures. “Sufficient” in this sense means sufficient unto salvation. Herman Bavinck also wrote well on this topic:
The doctrine of the perspicuity of Holy Scripture has frequently been misunderstood and misrepresented, both by Protestants and Catholics. It does not mean that the matters and subjects with which Scripture deals are not mysteries that far exceed the reach of the human intellect. Nor does it assert that Scripture is clear in all its parts, so that no scientific exegesis is needed, or that, also in its doctrine of salvation, Scripture is plain and clear to every person without distinction. It means only that the truth, the knowledge of which is necessary to everyone for salvation, though not spelled out with equal clarity on every page of Scripture, is nevertheless presented throughout all of Scripture in such a simple and intelligible form that a person concerned about the salvation of his or her soul can easily, by personal reading and study, learn to know that truth from Scripture without the assistance and guidance of the church and the priest. The way of salvation, not as it concerns the matter itself but as it concerns the mode of transmission, has been clearly set down there for the reader desirous of salvation. While that reader may not understand the “how” (πως) of it, the “that” (ὁτι) is clear.
Covenant Presbyterian Church (OPC)
Hammond, WI, 54015