That would only come through the Holy Spirit.
I have heard some Bible University graduates preach the word without knowledge and understanding.
I have heard a simple uneducated person preach with lots of knowledge given to him by the Spirit.
The first one was reading from a piece of paper.
The second one did not read from notes.
But there comes a time when there's a World of difference between the two.
And that's when there's competing theologies stemming from the same scripture.
I can point to the book of John itself to show exactly what is being said and why. Nothing fancy whatsoever. No extra biblical knowledge needed. (But it does help with this section)
The common mistranslation and flat reading strays way outside the norm of every theology the Bible expresses. Again no studying needed.
For the common understanding all you have to do is not use your brain whatsoever and mindlessly accept what the guy in the pulpit is saying.