This Saturday we had a conference with the Area President and Elder Holland with the three Buenos Aires Missions. There were about 800 missionaries. We sang in a small group of 8 for a musical number. He said that there is probably no other group on the Earth more prayed for than the missionaries, and that we are the most visible part of the church. At one point he was going through D&C 50 and after reading v. 27 he paused and said "We don't even have a coast of an idea what we're doing." He said that all of us, even the Apostles, live far below our privileges.
He said that we should never speak of missionary work as "fulfilling an obligation" or that after we'll go back to "real life." He said that this is as close to real life as you can get. He started speaking about obedience and then said, "I don't feel that there are problems with obedience here. That's not the feeling I get. But it would be ridiculous if I had to speak about obedience! This is the Gospel of Jesus Christ! Why would there ever be problems with obedience!" He said that while he was the head of the committee over Preach My Gospel, the title was chosen very carefully from D&C 50. Quoting from that section, he made it very clear that in the words of God it is "MY" gospel. We cannot chose what to teach nor how to teach it. We teach the doctrine exactly as it is and by the Spirit. There is no other way. All other ways are "not of God."
The Church is true. The Gospel is happiness. All things contrary to the pure Doctrine of Christ and all of it's appendages are in a state contrary to happiness. I remember a sister who spoke in a devotional at the MTC who worked many years in the Church and with the MTC said that we should be so incredibly optimistic that people look at us and say, "Who are you?"