Scripture is Perspicuous
[Scripture] is clear and perspicuous in this sense: although the subjects of Scripture are often difficult to understand, nevertheless, its mode of teaching and explaining them, especially in those things that are necessary, is clear and perspicuous, at least for those who have the power of spiritual sight. So then, if some obscurity is perceived in the Scriptures, it is surely not due so much to Scripture as to the feebleness of our intellect.
Petrus van Mastricht. Theoretical-Practical Theology: Prolegomena, ed. Joel R. Beeke, trans. Todd Rester, vol. 1 (Grand Rapids, MI: Reformation Heritage Books, 2019), 232