In Luke 4, what spoke to me this morning was when Jesus was in the wilderness and being tempted by the devil. People will say that this is how we know that Jesus can be, and is, sympathetic (and empathetic) to us, and that He completely understands what it is like when the devil tempts us. I should note here that God does not tempt us to sin - the devil does that. God provides ways for us out of the temptation.
But, while what I just said is true, the part that speaks to me is that Jesus always had an answer when Satan tempted Him. He was able to "back things up" by saying something that was written in Scripture, and He would begin His reply with, "It is written...". That is why I need to immerse myself in the Word, learn it, and memorize it. Elsewhere in the Bible it says we must be prepared to give a reason for our hope..."always being ready to make a defense to everyone who asks you to give an account for the hope that is in you..." (1 Peter 3:15). If we don't know the Bible, we won't be able to back up our answers and give reasons "why".
I know that not everyone I come into contact with will accept an answer that is backed up with "it says in the Bible...". Those are the people who would most likely say that the Bible is full of fairy tales, or that it was only written by a bunch of men years ago. I think, for those people, it would take more than that to turn them towards God. That would be whee "practice what you preach" and prayer would come into play.
But, regardless, it is important to get into the Word and not just read it, but memorize it, know it, and live it. If Jesus knew the Word and used it in battle (and obviously lived it), then it must be important for me as well!
I am not quite awake this morning, so I apologize if this sounds incoherent. Have a Christ-filled day!