I suppose the difference is not in understanding, but in experiencing that understanding changing as I change, and paying attention to the difference. I have had many verses change in my mind as I grow. A few weeks after I came to know God, I tried to memorize the following passage:
Mark 4:21-25: Also He said to them, “Is a lamp brought to be put under a basket or under a bed? Is it not to be set on a lampstand? 22 For there is nothing hidden which will not be revealed, nor has anything been kept secret but that it should come to light. 23 If anyone has ears to hear, let him hear.”
24 Then He said to them, “Take heed what you hear. With the same measure you use, it will be measured to you; and to you who hear, more will be given. 25 For whoever has, to him more will be given; but whoever does not have, even what he has will be taken away from him.”
Initially I thought it was about my walk, my new understanding of the word, that I needed to study and learn, perhaps it was. Then it became about how I listened to God, how I could find Him. Then it became how God knew me regardless of what I tried to hide, or that I would be treated as I treated others. Then it became how I presented myself to others. Then it became how I used the understanding that God gave me to help others. At different points as I studied and tried to memorize and learn the true meaning, the meaning changed. The meaning became deeper as I prayed for understanding. It means all of those things, and more that I have yet to learn. The same scripture means more than just the words and continues to change in my heart and mind as I grow.
My point is that this occurs with all scripture to me now, because I have a relationship with Him. The scripture itself is Jesus to me, talking to me and instructing me. What I read today may or may not mean something different tomorrow. I have to listen and pray, then He teaches me how to be better and how to live with the goal of entering into eternal life with Him. He has written it all down for me, but I have to seek Truth, I have to converse with Him, I have to know Him, not just read the words.
So often in my former life, I would read something and disregard it if it didn’t mean anything to me. I know not to do that with the bible. If I seek truth, I find it. I can’t just go “pfft” and put it down. That is the relationship part, knowing that there is something there and it goes two ways.