I apologize, I've been giving you a spiritual answer to test your understanding.
A person can be born again at any time in their life, assuming they understand their sin and God's gift in Christ, and in an instant they are transformed. However, understanding anything, including what the Lord has said, requires knowledge, both of scripture and of the world. Prior to salvation, some people know a great deal about the world, but nothing about scripture. Others know a great deal about scripture, but very little about the world (their heads are in the book, which is good, but their eyes don't see all that is around them.) Still others know very little about anything.
The proper way to interpret scripture is to understand its context, trust in what the Holy Spirit is telling you, and verify that the meaning agrees with the body of scripture (some interpretations are really just applications, but we can't always tell the difference.)
When we receive His Spirit, our minds remain trained by our education and knowledge of the world (our world view) which varies widely across the planet and across time. Consequently our understanding of scripture changes as we grow and mature in Christ. Its not unusual for preachers of the word to modify their view of a particular passage of scripture when they review it at different times in their lives, because their understanding of everything changes both with experience in the world, and with the "renewal of their minds" which comes in the working out of our salvation day to day and our ongoing study of scripture under the guidance of His Spirit. The more mature we become spiritually (not physically), the closer is our understanding to the author's. He teaches us what we need to know for salvation and for righteous living, the rest is just gravy. This also means that the Lord reveals what we need to know in His time, not our own, and He never gives us more than we can handle. Teaching in the church helps to bring us "up to speed" with the general understanding of the church that we attend, but human teachers make mistakes because their understanding is always limited by what the Holy Spirit is teaching them. The RCC has tried to get around this by an established dogma emanating from the Vatican and a historically recent doctrine of Papal infallibility (there was no reason for such a doctrine prior to the wide spread publishing of scripture in various languages.) Unfortunately, the Vatican placed itself in a box delineated by error through that same doctrine. The Pope can't reverse the declarations of another Pope or even his own without revealing the farcical notion of Papal infallibility.