In section 18, Joseph Smith and Oliver Cowdery were told to “build up my church upon the foundation of my gospel and my rock” (D&C 18:5) and to rely upon the things that were written in the scriptures. They were instructed that twelve would be called to preach the gospel. David Whitmer and Oliver Cowdery were called as two of the Twelve, and they are told to seek out the others. The Lord told them that the worth of every soul is great, and His joy is great in the soul that repents. Our joy will also be great as we lead others to Him. 

In section 19, the Lord reminded us that we must repent or we will suffer. Jesus has already suffered for us more than we can imagine. All we need to do is repent and turn to Him. The Lord instructed Martin Harris to sell part of his property and pay off the debt to the printer in order to complete the printing of The Book of Mormon. Martin Harris faithfully did as he was instructed, even though it was a great sacrifice. The Lord promised to pour out His Spirit and great blessings upon Brother Harris for being obedient. We also learn in this section that if we learn of Jesus Christ and follow Him, we will have peace. 

Joseph Smith, Martin Harris, Oliver Cowdery, and David Whitmer are just a few of the faithful people who sacrificed much to build up Christ’s Restored Church. We can continue to build up Christ’s Church as we repent and invite others to repent and follow Christ.