2 Nephi 4: 15-16

When we preach the gospel of our Lord, we know that we are doing the right thing, and we can help other people to go back to our father in heaven. Usually when we help other to do something or finish a job. We will feel happy. However, when we help our Lord to do his job to teach other about him and what he did for us. Our soul will feel happy too. Because we know that God live and we will all see him someday, but not everyone of us can live with him forever. So we teach people how to prepare themselves to become good enough to live with our dear heavenly father and our soul should be happy and faithful to Him.