Alwyn York, The Holy Spirits Illumination of Scripture.
The Holy Spirit enlightens a person, not by giving an added content of knowledge, but by mysteriously operating on his heart so that he can see the revelation already given. The image used in Scripture is of removing a veil (2 Corinthians 3:15-16)… The truth was there before them all the time, only they were prevented from seeing it.
Alwyn York, The Holy Spirits Illumination of Scripture.