Psalm 119:105 "Your word is a lamp to my feet and a light for my path."
Psalm 119:130 "The unfolding of your words gives light; it gives understanding to the simple"
These verses do remind us that God is light. If he is light, then we can expect what comes from him to be light as well. In this case, his words/Word gives light. In order to give light, his Word must have light shining from within it. This light is inherently a part of his Word. If we are truly studying his Word and in his Word, we have no other option than to be affected by that light. How might we be affected? We see in these verses, understanding and guidance. I don't think these will always be immediately obvious to us either. Vs. 130 says, the unfolding of your word. To me, that says there are parts that we will not immediately understand or see. We have to delve into it and consistently be in it in order to see that unfolding. Another thought about consistency, if this is to be a 'light for our path', then we need to be carrying it with us. It can not be something that we only pick up from time to time. Then our path won't always be lit. I'm not saying you should be memorizing a verse a week or anything like that. If you want to, great. I'm not saying that you need to try to read the Bible cover to cover in a year, 90 days, or whatever. Just be in the word everyday, maybe that's 5 minutes, maybe that's 35 minutes. Maybe it is memorizing, maybe it isn't. If you are consistently reading with intent to learn, I think the memorizing will come. Maybe it is journaling, maybe it isn't. However, you feel it best to carry it with you, do so. Just remember a light is only good when you have it with you. It does no good sitting at home on a shelf.