To expound something is to explain it in detail (Oxford English Dictionary).
During His ministry on the American continent, the Savior expounded the scriptures to the people. He expounded the words of Isaiah and Micah (3 Nephi 20-22; see 3 Nephi 23:6). He expounded the words of Malachi (3 Nephi 24:1). He identified connections and themes across multiple scriptural passages: He “expounded all the scriptures in one” (3 Nephi 23:14). He expounded many other things, “both great and small,” from the beginning of the world until His Second Coming. He expounded far more than is recorded in the Book of Mormon (3 Nephi 1, 3, 6).
His exposition on the words of Isaiah began on the first day of His visit, but the people were overwhelmed by the amount of content. “I perceive that ye are weak,” He said, “that ye cannot understand all my words.” He told them to go home, ponder what they had heard, and prepare their minds to learn more the following day (3 Nephi 17:1-3).
There is a lot of depth to the gospel. Yes, the basic principles are so simple that a child can understand them, but you can also spend an entire lifetime gaining greater understanding and still have more to learn. So when the Savior commands us to “search these things diligently,” I think He is signaling that it won’t be easy and that it won’t happen all at once. Don’t give up. Keep digging. Keep working at it. There’s a lot to learn, and it’s worth the effort to uncover it a little bit at a time.
I was intrigued by the following guidance from the Come, Follow Me manual:
Revelation often comes “line upon line” (2 Nephi 28:30). As you ponder the verses you are studying, ideas and impressions may come to you throughout the day. Don’t think of gospel study as something you “make time for” but as something you are always doing.October 19–25. 3 Nephi 27–4 Nephi: “There Could Not Be a Happier People,” Come, Follow Me—For Individuals and Families: Book of Mormon 2020
Today, I will study the gospel diligently. I will remember that the Savior expounded the scriptures—explained them in detail—and that He wants us to make the effort to understand the gospel better.