The word "Lord" is quite interesting. I noticed that in Jeremiah, Haggai and Zechariah it is used a lot, about 12 times per chapter. Generally speaking Lord is said about 5 times per chapter, much more in the Old Testament than in the New. For example the two books in the New Testament that say Lord the most are Luke and Acts, but they average about 4 times per chapter. The book in the New Testament that has the highest average is Jude with 6 mentions of Lord. Think about that, Jude didn't want to focus on the warfare, rather he felt compelled.
Jude 3 Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints. 4 For there are certain men crept in unawares, who were before of old ordained to this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ.
But in the Old Testament Jeremiah, Haggai and Zechariah all average very close to 12 times per chapter. That also is because of ungodly men.
What does this mean? It may mean that we have been given a new heart, a heart of flesh, and that means we don't need to see Jesus as Lord as often in the New Testament as we did in the Old.
I used to teach HS in the inner city of New York. As a teacher you must wear many hats, one of which is "Lord", but that is not one you want to wear. It is essential that you deal with discipline issues thoroughly and in a way that is conducive to the entire class moving forward throughout the year. I learned that you cannot bluff, you absolutely must follow through. On the other hand you need to find that path that leads to everyone moving forward.
My certification was not in Chemistry, I don't have a degree in Chemistry, but I will always say that Chemistry was the easiest class I ever taught. The reason was simple, these were the best students in the school and discipline was not an issue. The classroom they gave me was smaller than the other rooms and yet I had 35 students the most you can have. The room was so packed you couldn't walk around in it. In any other subject it would have been a catastrophe trying to teach. But in this class it was a non issue because the kids all wanted to learn, to pass, and to be able to pass the regents exam.
Interestingly there are only two books in the New Testament that do not mention Lord, and that is 1 John and 3 John. There are only two books in the Old Testament that don't mention Lord, Esther and Song of Songs.
So then what is the point? We are being trained to rule and to reign with Christ. That is what you saw in Esther and that is what you saw in 3 John. What is ruling and reigning other than walking in the truth. We are drawn to the Lord when He is revealed as our first love, that is the essence of the gospel.
3 John 4 I have no greater joy than to hear that my children walk in truth.
Walking in the truth includes not following that which is evil.
9 I wrote unto the church: but Diotrephes, who loveth to have the preeminence among them, receiveth us not. 10 Wherefore, if I come, I will remember his deeds which he doeth, prating against us with malicious words: and not content therewith, neither doth he himself receive the brethren, and forbiddeth them that would, and casteth them out of the church. 11 Beloved, follow not that which is evil, but that which is good. He that doeth good is of God: but he that doeth evil hath not seen God.