I think that it is very dangerous to impose a separation of formal
"book learning", and teaching by the Holy Spirit. Most who do impose this
separation, are from anti-intellectual groups that ditched the intellect as a
useful tool, during the European Enlightenment. This ditching of reason,
has become part of their theology. But, it is not the orthodox Christian
approach to learning.
The Apostel Paul was a very educated man. And, he wrote 60% of the text of
the New Testament, including much of the "heavy" theological portions.
We would be wrong to argue that because he was very educated, he could
not find truth.
Even skilled secular linguists, can study how the biblical languages were
used. This knowledge, is valuable.
I have noticed on Christian apologetics sites, that perhaps 60% of the
inquiries or assertions, can be corrected simply by using the world-class
Greek lexicon of the New Testament, and the Greek text of the New
Testament. This reflects a crude lack of knowledge of the biblical
languages in American culture, and among Christians, and is not a
comment about the Holy Spirit. Christians would understand much
more of what the Scriptures say, if they would learn the basics of the
biblical languages.
It is true that simply getting degrees in college, is no guarantee that
a person is a Christian, or has understanding. But, this is always true,
and should not be used as an argument AGAINST getting a formal
education.