Does God Keep people from understanding the Bible.
If yes give an example from Scripture.
The only people that will read the bible to try to understand it, are the regenerated children of God, who have the indwelling of the Holy Spirit. The natural man thinks the things of the Spirit are foolishness, and could not discern it if he tried. But, yes, the Holy Spirit, within them, will not reveal the full meaning of the gospel of Jesus Christ, until they deny themselves (lean not upon their own understanding) Matt 16:24.
I learned this lesson the hard way, due to my pride, and being stubborn. Scriptures, "seemed" to contradict each other to me, and I thought that I was smart enough to figure it out, if I bought a Strong's concordance, and studied hard enough. I tried for 12 years to understand, without any results. When I finally admitted that I was not smart enough, and would have to be content to not understand, it was not too long after, that the Holy Spirit within me, began to reveal a little here, and a little there.
If the Holy Spirit had revealed anything to me, with the mindset that I had those 12 years, I would have taken credit for my entilect, and not given God credit. I believe this fact is why God keeps most of his children from understanding the full knowledge of the gospel of Jesus Christ.